I second Broran Inc. maybe not the trans, no opinion on that, but the rest i like a lot. although wouldnt be mad if you add trans if thats something you would be ok with adding.
inflation, mpreg, urethra. all things i like. Also just had to add, since i read another comment. cursed comments like tentacle underwear sounds fun. and oviposition. maybe also the posibility to keep cum or eggs inside even after the sex for a bit, even if not permanent? although no clue how hard that would be but might allow some gameplay features where you need to be inflated to have more mass or stuff like that
also think with krillin he meant more like, make it look like the struggle is two sided ( player tries to get away while others try to fuck him), not sure why since it already works that way anyway. but also like humiliating comments in the end? like, how weak or submissive or slutty the character is to lose to him. etc.