And I dont think snatch is big map per se.
Pantherbase is pretty big, but not known. Cathedral is big but people dont like it too much.
Praetoria mission 1 & 2
Burg rabenhorst
Those are bit bigger maps, but dont know if people knows them or likes them. By bigger, I mean objectives are not so close to spawn or majority of map has more than 1 way to progress.
+ they all should have bot waypoints.