A lot of the comments here seem to be about graphics rather than gameplay.
Actually, for the first time in my life I just left the graphics at default settings (auto-configured based on your PC specs) and got on with playing it. This is unheard of for me as I usually whack everything up and see how I get on.
I had BF3 on Xbox 360, so straight away playing at 1080p is a huge visual upgrade anyway, and though Anti-aliasing isn't on it's running most of the settings on high. My spec is:
i7 4470 @ 4.5Ghz, Sapphire HD 6870 1GB, 8GB Ram, Windows 8
Clearly the GPU is of far lower spec than most people here have, and it really is rather smooth (will have to post a screenshot of the settings later)
Not only that but i'm playing it all with an Xbox 360 wireless controller! I play on my sofa infront of a Plasma TV, and cannot get on with keyboard and mouse anymore. I've never really been a great k/d player anyway but i've topped the leaderboards of 2/4 games played anyway because of flag captures, defends etc etc.
Anyway, I'm really positive about the game now.
1) I really like the new spawning system. It's harder to stop captures taking place now as you have to sprint to a contested flag rather than spawning pretty much on top of it and immediately halting the capture
2) I like that you can see 'spectator view' footage of where you squadmates are when you spawn, and also vehicle footage so you know not to spawn in on a helicopter that is about to crash for instance.
3) Haven't found much 'levolution' stuff, but watching the skyscraper come down and seeing the people having to parachute off it was really cool. At the moment a lot of people don't seem to know how to bring it down (attack the 4 pillars) but I assume once the game is properly out, a lot of these events will be 'activated' pretty quickly in most games. Anyone else know what else the level has? I think it has shutters on some of the shop windows but I've not been able to find the button to activate them yet
4) Helicopters don't seem as deadly, and RPG's seem faster (?) so are more useful against them even without heatseeking. Do helo's take longer between reloads or something now?
5) You seem to get a lot more points for objective based gameplay as well which I am very pleased about, just hanging around a capture point you already hold gets you 20 points every so often (you are in effect protecting it) and you also get a lot for a capture now. Really pleased they are placing more emphasis on objective gameplay over k/d
The only thing I don't like so much (at the moment) are that there are a lot of snipers on building, but as you unlock more gadgets such as morters, they should be easy to deal with.