100% agreed. Cross-ups are a wonky by product of a flawed system. It has become accepted by many, and erroneously regarded as "real tech". It isn't. A dedicated block button fixes this flaw, plus it eliminates a handful of other problems that directional blocking causes. My opinion, of course. But it also happens to be fact.
Lol, I had to stop and rely to this one right away. The "flawed system" is only flawed in your opinion. That being said, you killed your argument before it even got challenged. Btw, that ending makes you sound like an ass considering how you're trying to pass opinion off as fact.
Anyway... I like b2b personally, but I feel like injustice left a bad taste in people's mouths about it. Mainly because there were very few reliable anti airs in the game. If you can react to a potential cross-up attempt and make a split second decision to walk forward or back, you can react to a much simpler, "oh he jumped? Let me d2 him real quick." If you didn't have to play flash, or aquaman to shit on random jump ins I feel like most people wouldn't mind b2b.
Losing ground because you're backing up is a valid complaint, but it can be easily remedied by holding down and reacting to jump ins/ overheads. I used to do it all the time and I wasn't even good at the game.
I saw people saying that opening someone up with a block button came down to reading movement and reacting to your opponents options. It's the same shit with b2b, it's just that you can get punished much harder for a bad read. If AAing was a real option in injustice, you wouldn't even have to do the guesswork. You'd just let people close the distance on you (hold down) and anti air that ass for being stupid.
Jump ins and cross-ups out of setups are a different story tho, you're going on a ride at that point. All that does is put more emphasis on controlling the neutral game to keep yourself out of those setups. I know that's like saying, "just d3 between Kabal's dashes, bro." Yes, you're going to get hit eventually, but no one can block forever anyway. This is why footsies are important, NRS.
Also, if there was no dash blocking people wouldn't think there's any difference in mobility between holding down or R2. Either way, you're still sitting there waiting for an opening.
All of that said, back to block or a block button isn't gonna stop me from playing a game. I just prefer b2b. Writing all this out made me realize how shitty injustice was for Back to block.
TL,DR: I'm cool with either one. Both have pros and cons.