I don't understand the logic. We don't want the game to more accessible? I don't know about you guys but when I try to explain fighting to my friends, it's real simple, until we get to execution. That's where I lose people all the time because no one wants to go to the mountains for 40 days and 40 nights practicing one technique.
I get perfect pivoting. I don't think that should be maid easier, mainly because I don't think there would be a reasonable way, but for this a simple empty button could be added, they add the smash button input, this would be much easier, and from it, new tech could arrive.
And the problem with this scenario is if you mess up you get a dash attack and that's all she wrote if they block it. At least when you get a tilt when you meant to smash it's not the end of the world, so it 40 days and 40 nights were if enough, now any time you mess up you'll get punished, and even worse, if you're playing online because you don't have a scene or because people have lives outside of games, you may have actually had the timing right, but online gave you a dash attack.
The heart of fighting game lies between the decision making between players. If they make an "up B" button, it shouldn't matter to you, what matters is: they have an option. The only thing making execution easier does is extend those options to players that wouldn't normally have the patience to master their execution.