The ability to choose whether or not other people can ask you if you want your art in a group. Like, in the settings. It could even have three options, which allows friends/mutual followers to suggest it.
I know we get right of first refusal, but what I really hate when it's some kind of rando group that does rando art. It's like some person just goes through newest, probably with some word used, and just tries to add everything to the groups they're in that do art.
If I wanted my art in your group, I would have joined said group and submitted it myself.
The only groups my art is in are RP groups. More specifically, RP groups that I left on good terms with. (I removed all my art from those I didn't.)
So, I will continue to press "No" but please, please have a feature that lets me save the trouble.