Okay, I'm a little late to the game, but a friend gave me a key to try this out. I must say, the game looks amazing thus far, however, with the current ability to customize settings (at least what I could see of the options screens), the game is almost unplayable for me. In fact, I haven't finished the tutorial because it's kind of frustrating.
The issue: I have 4 monitors and the game allows the mouse pointer to wander off the screen the game's on. So, for instance, if I'm trying to block multiple times, I'd need to recenter my mouse which changes the direction I'm blocking, etc., or after a little while there's a good chance that I've moved the mouse onto one of the adjacent monitors and I end up clicking outside the game which makes the game lose focus. Sometimes the game even minimizes itself. Then I have to click back into the game window, or go down to the taskbar to regain focus. And for whatever reason, after this happens, the game doesn't seem to register the direction I'm trying to block properly afterwards.
I've played a number of other alphas/betas in which this was a problem, but eventually they added a fullscreen or borderless/windowed fullscreen mode and made the application hold mouse focus which alleviated the problem. Hopefully this game will get that so I can get further.