The MP is awesome but then again I dont have anything to compair it to apart from resistance which it blows out of the water imo.
I suck with the controller tbh and thats why normally I'd play an FPS on PC. That being said it still has me wanting to play it which is a first for online MP on the PS3 for me.
Most things cant be used until you have leveled up a couple times. After leveling up you earn stuff like the ability to make a squad or clan or new wepons and medic badges etc etc.
Will it last I dont know but what I can say it is alot of fun and seems to have really tackled the online MP very well but am no expert.
As you said Stone the Campaign is very hard at point's but thats what makes it more fun for me. Really really impressed with the campaign side of things.
Overall I'd give the game a 9/10 for an FPS on a console and from me thats alot lol. Hope you all enjoy it as much as I am