I've been enjoying the beta more and more, really getting back into Quake, though I didn't play much during the last beta session. I like Sacrifice, I think it's a good blend of CTF and Domination, but I'm not sure if I like it more than either of those modes. They're trying to set it up to be an e-sport so they'll probably keep the number of modes down to prevent splitting the community, ala Doom 2016 multiplayer.
They need to work on hit detection. It can be bad sometimes. I've watched streams of Rapha playing and seen a couple of his rails go straight through people.
Clutch needs some retooling as well.