About the Dik/Chick affinity, i agree that it has lost it's purpose, in latter episodes there are no choices at all that would require a certain Dik status. In earlier chapters at least it was required for certain extra scenes or options, but in episode 7-8 i don't remember anything directly related to status.
Affinity choices can actually branch you to a certain path, but there are a lot of affinity choices, that make absolutely no difference in the game so far, especially the fighting choices. It doesn't change anything in the game if you beat up Troy, or if you fight the alphas and Caleb, or you punch Tybalt. Basically everything happens in the same way if you just walk away. Also there are no fighting scenes since episode 4 or so, which is a bit of a shame given it kinda looked an important aspect of the game.
And so basically if you avoid fights, but take all other DIK choices you can end up fucking almost everyone at the same time with a neutral/chick affinity and huge Dik status. In my current playthrough for example i fucked Quinn on the roof, then i became a trouple with Josy and Maya. In the preps mansion i had sex with Riona, Camila, Lily, Sage (probably even the Melanie scene is possible if i was going for it) and then i went back to have sex with my gf Josy, who actually wants me only if i'm neutral or chick. And so later i'll be going for Jill and Bella as well, as i'm still on their paths too, i'm neutral affinity and easily could end up with Jill after all this dicking.