I haven't check this thread since the last time i've posted, and i see a lot of people trying to blow me up lol, there was less much evidence about it before my post.
If is indeed it costs 100% stamina + two bars of meter to pushblock as if you either push the chip or the hit but you can't do both then i'm okay with it, its a risk reward situation and i doubt we will see much of it unless in situations where it will be absolute necessary.
Back dashing doesn't really work in the corner even with invincible frames. It can work, but it usually ends in the aggressor's favor.
You can either propel out of the corner and even with armor just to make sure you get out.
Either way the aggressor still has to scope all your escape options.
My only worry before (which i don't have anymore) was:
You're a rushdown character who excels up close with chips and mixups, and you're fighting a character that excels at zoning that getting in might be a nightmare, and put to trough hell to get in, and when you're finally able to get in, he push blocks you away and reset the advantage you've gained, now you have to go trough hell again to get in while he sustains the lifelead.
But since it cost the same requirements as a the breaker, then i see no problem, its not something that can be pulled off left and right without considering the following "what if i actually get it?"