I think that he definitely needs more work on his force skills, as Rey did manage block and use his force mind power in her favour, and again when they were both reaching for Luke's lightsaber.

Come to think about it, I'd be pretty frustrated if I was proudly strutting around as the poster boy for long lost Sith Lords, only to be bested by an amateur who'd discovered the force 3 minutes ago

Speaking of CGI, I didn't notice the Falcon snow, but I also thought that Snoke was represented poorly.