I mean, it sounds cool on paper, but... uhh from logic and game design standpoint, I am not sure how much of a good idea that is. Imagine you are a dude who likes porn games and who decided to try a new one so that he has new porn content to play with. You start up the game and it tells you to pick your month, birth sign, race with abilities, class, backstory, education e.t.c. While cool, it would be incredibly overwhelming for many players and I'd argue could doom the game (I mean, if the potential players quits due to being overwhelmed in the CHARACTER CREATION, how are you supposed to get funds to continue making the game?).
It's not really a question of balance. Yeah, this is a PvE game, so it might not really matter, but roleplaying is an important aspect. If one of the TFs can be a difference between losing and winning a fight - some people might gravitate towards them despite not liking it. Fenoxo games are turn based RPGs. It's not Dark Souls, where if you are good enough you can just play Fashion Souls and wear the coolest looking armor sets that actually provide 0 DEF. Many players will pick objectively the best option for their equipment that will raise their stats, even if in reality they don't like it.
If I am not wrong, there is an armor in CoC2 that turns you into a female if you wear it. Now, imagine if that armor had wacky balance and was actually the best armor in the game. Imagine if it's objectively the best way to make your badass Male Barbarian character stronger and capable of beating one of the bosses. Now, thankfully, that ain't the case (I hope) and the balance isn't this fucked. But I hope you get my point. Given the opportunity, people will optimize the fun out of the videogame. If CoC2 allows you some sort of Chameleon TF that makes your evasion to go 100% - many players will pick it, because it gives them more power.