Alright I apologize for being a little too hostile about the spawn issue, its not THAT bad, but it does have noticeable issues. I'm sure they can be partially supported through a patch.
As for some quick impressions, because I'm still playing Multiplayer.
Pros:
-Runs smoother then ever, which is a no-brainer for CoD but coming off BF3 on 360 this just feels like butter.
-The guns feel and look amazing, but most noticeably sound fantastic. Much improved over MW2
-More challenging to unlock higher killstreaks like the AC-130 and Osprey Gunner because of there being no Harrier.
-The maps are surprisingly pretty sweet, some high highs and some low lows on that though. More good than bad so far in my opinion.
-The one-on-one gunplay is great, and seems very polished. Not sure how to explain this better but it "feels" better to put shots into someone.
-The un-lockable s, weapon levels, gadgets, perks etc seem to be a little overwhelming but actually quite nice because of the variety.
Cons:
-Although they arent the high streaks (yet) there seems to always be a bunch of shit in the air, especially UAVs and Advanced UAVs.
-The spawn system needs some work (noted this in TDM, Demo, Dom). I find myself many times spawning in positions where there are enemies behind me or very near me.
-Lots of the maps seem to promote camping/ camping areas
-Quick-scoping seems a little too easy (could be a pro depending on your preference)
Can't really think of much else right now, I'll add things as I play more.
I can answer questions regarding multiplayer.