There's gotta be enough people pissed at UIF to do this in EU.
There are.
Problem is that 90% of them work only towards their own benefit. That is the reason why forming an anti UIF alliance did not work in the first place.
Nearly everybody will try to backstab others every chance they get so they will have the most fiefs/renown/whatever in the end.
That will never change since the playerbase does not change at all (Except for a few new guys, who basically will not be able to do anything on Strat anyway)
Same as what happened in NA, everybody and their mothers were being like "If UIF invades NA we will kick their asses!".
In the end loads of NAs signed up for UIF just cause they attacked Kesh (The enemy of my enemy is my friend-style).
There are only very few left willing to work towards the greater good. And these people are usually the ones most likely to get backstabbed by the rest.