i get that losing cover because of enemies blowing it to hell makes the game hard, but that is THE selling point for this franchise.  But I'm with you on lack of co-op, it seems like it would've been a major addition to put that feature in and would have made a more enjoyable campaign.   

i don't know your personal taste in online games, but I never liked military shooters, I have no interest in MW, but the online is super fun if you like being a good team member. I get tons of XP and fun out of doing the little things to help out my team, who are all random people because none of my friends have it and it's still fun.

I'm only through the first 3 missions, so I don't have enough to make a full judgement, but here are some things I like/don't like so far: 
 
Like: 
 -The mechanics/engine.  The controls are good, and shooting works really well.  The buttons are only slightly different from other FPS's, which is a good thing. 
- Gun selection.  Already I've used several guns, and they've all had good pros/cons. 
-Achievement pace.  I've gotten some achievements for story, some for other things.  It seems like one pops about every 20 minutes or so. 
-Visuals.  The colors are very vibrant and the enemies contrast with teammates.
 
Don't like: 
-Health.  There's not a good indication of when you are about to die.  Sure it gives you some red border, but it's not enough to tell that you are in critical condition. 
-Grenades.  You can't tell where they are.  Having a guy yell "Grenade!" does nothing, just makes you panic for a second. 
-Destructible Environments.  Not that I'm against the idea, but it's frustrating when you can't find any cover because the enemies just blow it away immediately.
-Lack of coop.  You play in a squad with 3 other guys.   Why can't these be real people? 
 
 I've heard that the real appeal to this game is the multiplayer, but I just don't see myself getting into that.  This could be a game I trade very quickly.