I hear ya... but it seems your expectations may have been a little too high. The game clearly wasn't designed around armor breakers being a core mechanic; they're just a gimmick, really, thrown in to try to help balance out the broke-ass breakaway system. So we were always in store for a kludgey retrofit at best. The devs went character by character, looking at their existing move set and figuring out where to shoehorn in an armor breaker so it was at least sorta usable and sorta balanced. It was inevitable that some characters would make out well and some get shafted (square peg + round hole). The idea that we were getting (or ever will get) a smoothly integrated, totally fair and balanced AB mechanic is pretty unrealistic.
I wish they'd skipped the whole AB idea and just fixed the actual problems with breakaway. Now it kinda is what it is. I get being mad about the inherent unfairness, but does it truly matter? I'm not sure ABs had any meaningful effect on the meta anyway. The top characters (most of whom didn't get a good AB) are still on top. A few weak variations now have more reason to be played (e.g., Squander Kollector, Fan-Fare Kitana), but for the most part, the best variations before are still the best variations now, AB or not. And predictably, players have figured out when and how to breakaway to avoid ABs anyway.
Just my own opinion, but I don't want them to spend more time trying to fix ABs. I want them to fix the broke-ass defensive options that are the real problem, and otherwise work on quality of life features people really want (like a ranked mode wifi filter and penalities for serial d/c'ers).