I dunno that stop sign would totally defeat the purpose.

Part of why roundabouts work is that everyone is basically turning right to enter and right again to exit, meaning none of the traffic streams actually cross.

Stop signs would slow it down, but not by much. At least, not for the smaller things.

My biggest issue with people here is the frequency they wait for it to be completely clear before going, or the idiots trying to drift around it because, hey, that’s actually fun.