To be honest, I didn't check if adding mods is easy or not. I will check that out and let you know in the next dev note.
I love your idea because it can reduce the burden of development and players will like it.
Sorry to hear that, shame given that it would had been awesome, but no worries, maybe some other time.
As for the offer, that is very kind of you, but sadly the only OC i have is still being drawn, so right now i have none.
But i do have few friends that are great artists in the giantess community, with their own OC's, so if you are up for it, i could ask them if they are up for a collab, no pressure of course, i don't want to be pushy, its your project and i respect that.
Anyways, take care, thanks for everything, and all the best wishes to you and the game. :)