I'll wait until we see how it affects the meta before criticizing but, in theory, it just looks like applying a band aid on a broken bone to me.
You can still be breakaway punished with some characters and some characters who struggle to open the opponents will still be affected by this mechanic that comes back every 30 seconds.
You open the opponent, you damage the opponent as a reward. I'm not against a breaker once or twice in a game, but the attacking player should always be at advantage after the said breaker (or a the very least back to neutral). Don't get me wrong, armor breaking moves are better than nothing but it still adds a layer of guessing where it shouldn't have one. What's the point of having a game with almost no 50/50s in the roster if you have to guess everything else ? : taking the risk of teching a throw because of the escape failed KB, cashing out a combo but taking the risk of breakaway/being breakaway punished and now : combo the opponent for full damage or use a armor breaker and potentially wasting a huge amount of damage. Guessing is okay, until a certain point.
The thing I very don't like with the inclusion of the armor breakers is that it shows that they don't plan to scrap or fully rework the breakaway mechanic in the near future.
Maybe I'm wrong - I hope I'm wrong - but I don't think it is gonna change anything.