...which suggests the addition of new "hopper" type pieces...
Dormant Grasshoppers

Well, if I didn't want people to use the concept, I wouldn't have posted it lol (everyone is allowed to use this concept)
In Permafrost, the dormant hoppers add an interesting decision point: freeing them enables KOTH, but also prevents you from winning by stalemate. There could be positions where you intentionally free the opponents' hoppers so they don't self-stalemate. It doesn't even have to be a central part of the position; you could just add some freeable hoppers to make the position more unique. And of course, having only made one position with them, I haven't fully explored all the possibilities yet.
I've been meaning to post this concept for days... it keeps slipping from my mind for some reason (obviously because bsrti named the gamerule that must not be named).
Anyway, here's a position: