It's perfectly fine to only take 1-2 hours after work if that's all you can, dont make the mistake of burning out trying to do more than you can, as long as some consistent progress is done it's better than getting frustrated and I wish our team had done that back in the day. Back to game stuff:
I like the idea of the strengths and weaknesses maybe just having like 3 of each move plus an ultimate once Yamaneko has trained after a certain point.
Just an idea but maybe have 3 types of battle cutscene for Yamaneko: Normal, Accidental (wardrobe malfunction like the ones you posted here), Taunt (only after sexual has gone up, maybe it adds some generic debuff to male enemies like shock, confusion, etc.).
Since this game doesnt go into battle fuck and adding too much may overcomplicate development enemy cutscenes like groping could also just be a special move of some enemies to add defense/attack down?