I didn't mind breakers in MKX. I think they would need to cost all of your defensive and offensive meters that way if your opponent gets aggressive and spends offensive meter, over commits, and gets tagged, he can't breakaway. I wouldn't mind seeing breakaway cost all 4 bars, to be honest.
We are at the end of the first "season" and this is there chance to make big system changes and keep the game fresh going it the next year. whether that be changes to existing mechanics or all-new ones, give us a reason to be excited for the coming year other than a slow trickle of characters. I think this new breakaway tech for Spawn is a good sign that they might just do that, I just hope they don't take to long to let us know what's coming.