High block is not fine. It's very unrealistic and make no sense. It's very OP even if someone rocked. mix it up the body?? Yeah!! It's really a huge problem in the stand up of this game. Every players throwing body shot first and then an opponent get rock, he can't high block up. Finally, you get a chance that you can beat him by high striking. It's so bad. In EA UFC1, there was weak block and you couldn't regained your stamina when you are moving with high block up. I think, it's way more fun than now.