1. I like the maps, they seem a lot bigger than I thought and don't have ridiculous heights for snipers like in aw. They are also full of colour and nice looking.
2. Guns look nice and sound nice. I also like a few but they can be very inconsistent.
3. Menu is cool
4. Like all the variety of score streaks (unlike aw)
5. Specialists don't seem overpowered (yet)
6. I haven't froze once and only had lag in one out of many games
7. Sniper scopes, red dots, etc are back to how they should be (unlike aw)

8. The time to kill is stupidly low and you die so easily. I've been 1 hit with a machine gun several times. You can't react easily if being shot in the back.
9. Matching definitely is not skill based, I've come up against the crappest people ever followed by the sweatiest people ever (this is understandable for a beta though)
10. DEMOLITION IS BACK
11. You can kinda of feel a bit of black ops 2 in the game
12. The running on walls is cool and much better than I thought
13. Jump movement is so much better than aw and less overpowered

All in all, I like the beta so far, but they better sort out time to kill, as it is ruining the game (you can't react and its hard to get kill streaks)