I just got done playing it for a bit and its not bad at all. It's still the same game, just minor things changed.
For me though it does seem to be a bit "jumpier" I guess, like less smooth moving. Others were saying the same thing. This jumpiness seems to make it feel a little faster.
The new views after death are awesome. You watch yourself get killed sometimes, like your fall, which is cool.
I did have a big problem at first when I joined a server. My ping was like at 100 and I would be trying to move forward and then it would send me back three steps to where I was before like every two seconds. It sucked but I just restarted, tried a different server and badda bing badda boom, no more problems.