Hey, man.
First of all, fantastic work with the feet/soles (shape, colors), by far the best out of any AI renders I've seen.
All three characters look hot so nothing to suggest about that, great work.
My two biggest suggestions are:
1. Make sure that feet always fit the character; a tall chubby blonde will have much different looking feet than a short skinny brunette.
2. Don't get distracted by requests asking to add a ton of kinks and fetishes, especially those you don't enjoy. That will make this game become like nearly any other game on this site; jack of all trades, master of none. Games that really focus on foot fetish are truly rare and I think you'll have great success in the niche, especially since it's your actual, real life kink.
Good luck and looking forward to the next updates.
Foot fetish thread if you're interested:
https://f95zone.to/threads/foot-fetish-thread-3d-2d-games-cg-comics-dojinshi-illustrations.35615/