Ya, she will go Broley mode and end up wrecking shop I'm sure. Universe 6 and 7 seem the most likely to join forces, though, if shit hits the fan.
On that note, notice how they didn't bother to develop some of the universes very much. Besides universe 6, we only know a bit about Jiren+Toppo's universe and they seem like good guys, then you have the dicks in universe 9.
I have a feeling Universe 6 and Jiren+Toppo's universe will be saved somehow, because we all know universe 7 is gonna win it in the end lol. My guess is after they win, Goku wishes for all the good people from the impacted universes to either get restored or have them all move to universe 7. This would then raise 7's "mortal level" and put it on par with the top 4 universes.