From reading this article, it seems like the quake pro players they talked to were happy with the movement. I'm pretty confident that the game will feel fine, they didn't fuck up when it came to Doom.
The only thing I'm really concerned about is the silly ability stuff, and the balancing of the various champions. It could have very serious implications for duels if it's not handled very carefully, and frankly I hope that for the duels they have a separate "champion" with no abilities, so it's a more classic style experience. Honestly, I feel like the whole "champions" aspect is just more bandwagoning on the new class-based moba shooter fad.