Well lets put it this way right now i got about 60,000 kills over deaths, only guy on my friends list who has a positive win ratio. The reason i beast at this is becuz it's the only COD i owned right out the gate! I started wit COD4 bout 2 years after it dropped same wit WAW which i won't play anymore cuz the mp40 ruined it! I talk hella shit to dudes on this game and have yet to lose a 1vs1. Pretty much all the stuff you mentioned that makes this game "easy" i barely use..Got every attachement for every gun, primary and secondary in the game, every pro perk, and fall camo on every gun i use. I've played this game more then any other game in the last year and i noticed i'll hop an any COD now (i still play COD4) and own as well due to the experience i got in MW2. I think the reason this games mp is doper then the others is all the guns is dope for the most part, killstreaks are dope, maps are better. I feel like the only thing they fucked up was the perks ie. cammando, one man army etc.. Trust when black ops drops i will be raping on that as well.. Just experienced at this point!
Edit: On another note im sic of muthatfuckas bein like "oh this game is easy.." If you suck at other COD's you are going to suck at this game too..If your good at other COD's you'll be good in this game.. Everybody has access to the same weapons and perks! I think that is just a line for dudes gettin owned at this game to use as an excuse. COD4 and 5 had killstreaks that stack, i never heard crying about it then?