I'm working to gain access, as I downloaded the alpha on my brother's gamertag.
That said, I do find the menus to be slow to load. This has been an issue for several years and is a gripe that I have heard from everyone I have discussed the games with. It prevents quick transitions from one mode to another. Loading into the player customization menu took 14 seconds.
The physics engine can also be a bit clunky. In Pro-Am, I drilled Texier into the boards, but my player ended up falling as well, Texier ended up on top of him in what looked like a glitched animation and essentially held my player down until Texier covered and started skating away, at which point my player started to get up.
Coming out of the Pro-Am challenges, there was also some crazy movements from the character animation.
I also did not see an option too adjust difficulty. While I'm sure this isn't an issue in the full game, I wanted to play on the various difficulties as there can sometimes be a disproportionate jump in skill level.