Yeah, I'm thinking that won't be ironed out before an RC version comes out. Hell, I'm still getting display driver issues after my laptop comes out of sleep - for the last three builds.
I'd imagine rsat is a little under msft's radar at this point as well.
Hyper-V console working for me, but lack of RSAT is getting on my nerves.
One of my pet peeves, RSAT is a built-in feature on server, but stripped out and made as a separate download on client. Seems intentionally complicated, just build it in.
Been that way since Server 2012 was released. The two versions of Hyper-V console can't talk to the other version of server. Try 5nine to manage 2008 from newer Windows.