Just a small idea for traits, I believe early on in the story when you try to take pics with Kali, it mentions how it'd be expanded in the future, with other girls? Well...What if traits played in to that a bit? Say, need X amount of exhibition and you'd unlock it on Y girl, and if they have Z other trait, you could do say a "different" kind of photo shoot, netting more money.
So lets use Lin for example. Get her exhibition to say 2 or 3, would unlock taking pics with her maid outfit, bit more for her Wednesday outfit, bit more and you could start taking more...Risque shoots. Say a blowjob photo shoot or something akin.
Personally, I'd want more out of traits than just that. Keep up the good work, Runey!
Afterthought: Typing it out, it sounds really dumb. But, none the less, I'll leave it here heh.