Overall, the closed beta seemed like it had a lot of potential. I am really excited for the game, and want to see more of it and how it shapes up over the next month.
A couple of things that I can say is that the flight controls could use some polishing for mouse/keyboard. The driving also seems a little bit off somehow, though I do appreciate how each vehicle has unique on and offroad stats and handling.
The shooting is quite well done, though I did notice that if you shoot the P416 (other guns might be affected by this too) that you start with point blank at an enemy, the bullets don't go where you aim. I put 10 bullets in the wall to the right of an enemy's head, instead of the bullets hitting his head, which is where my crossheir was aimed. Something to look into anyway.
The game was filled with all sorts of minor bugs and glitches, none of which were game breaking, but I'm sure you guys can get it fixed up within the month you have.
Here is a video I had of some such glitches https://www.youtube.com/watch?v=Kxg79-xBFoU