Uff, the laste page was hard to read...now i've got a headache from all the shaking and facepalming...
1. Time is irrelevant. Evolutions work like level ups in games, use and train your skills until they reach its peak, then the evolution kicks in. Remember our beginnings? We explored every way of the power, we had mental, shapeshifting, regeneration, adaption, absobtion and because of the fights speed, endurance, agility and much more, we even learned to use absorbed genes like the venom production, nightsight, etc. You could say we started out on a very broad range so it took some time to max all the skills out, but once they were, bam evolution. And this evolution allowed us to repeat it, we could enhance and improve all the unlocked skills again and bam, next evolution.
Now lets look at the others...they all focused on a minimum of skills. Jake only on the mental stuff, Claus only on his shield and his attack beam, Deryl only on his creation/manipulation, Danica only on her cross beam and -mark, that coloss only on his 3 colored auras, ...btw, it wasnt before or after the beach, jake evolved while messing with mias memorys, thats why he lost control and damaged her brain in the first place, thats also why she dont remembers anything now, he just deleted too much and for now its really hard to say if she will ever be the same again (she was a smart nerd, maybe she is now dumb as bread, or forgot all interactions with most persons instead of only jakes latest) or if you can restore some of her memories. Maybe bringing back her memories is our ticked to train the mental upgrade we got from absorbing jake...
However, they all made the same mistake, they focused on a few powers and evolved from there. Surely, on a timescale they all evolved much faster because they only used a small range of their possible poweres, but they also couldnt unlock anything new after they evolved. Jake had his improved mindcontrol, he didnt needed to talk anymore to command, but overall its still only mindcontrol, just one level higher...if we hadnt killed him and he could have evolved again this abilitity would likely expand from single to mass control and/or more complex instructions, but it would still be the same skill, nothing new. Claus forced his evolution and as a result all his powers grew, but they didnt really improve, they only got stronger, but didnt unlock their next stage.
To me it looks like you can only improve the powers you unlocked before the evolution. That would also mean a fast first evolution and the forced evolution with the drug would (b)lock out all the skills you didnt naturally unlock before. Ella however developed her skills in a wide range just like us, so her powers grew immensly just like ours...but she had a big headstart, she did it since school. Her storys hinted she ran out of time for whatever she wants so she took the serum and forced the next step...her training methods may suck on a personal point of view, but looking at it from the results i'd say we could outgrow her power if we never take the serum and just continue what we do all the time: use and train every skill we can until we evolve.
2. A relationship is not an ownership. If deryl just wanted to get his dick wet he took the wrong girl and if he prefers to cheat instead of just asking her if he could release his hormones elsewhere its not a relationship at all. She even kept the relationship after discovering his betrayal, so the chances of her to allow him his fun elsewhere until she is ready were pretty high, but no, he just was an asshole. Then he expanded being an asshole to you. He never had stopped because he just is an asshole. Good thing liz sacrificed herself to his fist once she saw amber behind him, otherwise nothing had changed at all. However, back from the history to the past, in the first release of the game we got to know the main side characters including deryl. He already was an annoying jerk there and prowdly showd off his asshole personality while the narrating hinted he was always the one that got you in trouble...then he drags you to a stripclub and o wonder, trouble...dunno what anyone could like in such a character, for me its the kind of human noone would miss at all. However, he helped us in a hard time, so if i can help him on the way i will try, but i dont consider him a friend and dont want to spend much time or energy with it.
3. From EVERY logical point of view jared can only become a monster. Remember keny? The second he saw us was his end because of the anger/hate for us. Now look at jared...we humilated him in so many ways...we gave his reputation a deep blow, we broke up his relationship, we refused and humilated him as female and we finally broke a few of his bones and forced him to submit like a beaten dog. Additionally for those who absorbed jake, we also have his imprint and the humilation jared got from him too. Overall, even if he could manage the initial transform without turning into a monster right away, at the first sight of us he will lose control, be it like keny because of the breaking anger dam or because of the humilation if his new powers fail to kill you ^^
His father...well, he was not really impressive from the beginning, more or less a loser with enough money to make people think he would be someone. I think he would chance similar to jake, maybe with other powers ("maybe" because the host and the power need to be compatible and it seems he is pretty similar to jake except for his wealth and initial corruption due his lack in morals, so i wouldnt wonder if he would become some mindcontroller or mindbreaker as well). However, if we dont kill jared he wouldnt have much reason to do anything against us if ella dont indoctrinates him to go after us. At this time in the story its more likley he goes against his business rivals and if he drowns in his new power he may even suicide by trying to reclaim his tower from ella.
The final note for michal...he trains to reach the maximum of his human abilities before trying to become a superhuman...so we can assume he will fight the monster head on, thats also why he wanted a second pill in advance because "if the first one dont survies..." maybe its just a gag from the dev and he beats the shit out of both without getting infected/transformed at all ^^
His strong will and high selfcontrol may be hard to break so its unlikley he would turn into a rampaging monster, but if i remember correctly you need to (temporary) loose/submit at least part of yourself for the evolution, so he could prevent himself from it. Okay, theoretically that would give him time to expand his skillset, but based on what we know about him he dont cares much about anything else. I think his internal battle will be more complex than any other we have seen so far and the result will be critical, if he loses there is no doubt he will turn into an almost instoppable monster, but if he wins there are two possible outcomes...either the power "submits to him" and he will be able to fully controll it, or he totally breaks it and remains/becomes human again, maybe with some lingering benefits like higher regeneration and resistance. Either way, with his mindset i dont see him becoming anything more as a front soldier, but with his habit of killing people without any mercy and the gained ability to absorb them and learn from them instead of dumping the bodies somewhere like before, i think we will learn pretty fast what corruption looks like in its final stage.