Just had a round on the test server (I did not play the 1st test server).
Game overall feels much smoother. I think fps might be higher but its hard to tell at the moment. Everything feels very smooth at least (that being said, it was pretty smooth before for me after I updated to the latest Nvidia driver).
New UI looks great, looks and feels a lot more polished, although I think the text in the inventory is a little big (mainly on attachment descriptions). Game seems a bit more vibrant and colourful now as well. Minimap looks quite bland now and the map has changed - it looks both better and worse at the same time, hard to describe.
New sounds are awesome. Vehicle sounds are great (I know that was in the previous build). Red zone sounds pretty beefy now as well.
I think when you are in the blue zone, you get a wierd kind of notification / "dong" which I guess might be useful if you miss it. Was a bit irritating for me however. I think this was just distant (but loud) red zone explosions.
Not had a chance to try out the new weapons yet or really ballistics.
I tried to use the kill cam after I died but the game crashed
Edit: 2nd game got to try out the DP-28. If you are unprepared for it the recoil is quite high. Once I had shot it a bit I got used to it. Rate of fire is pretty slow but seems decent. Got a chicken dinner with it as well.
Over all patch is pretty solid - cant wait for release