Dont really think its alot like Black Ops, graphics is much better than on BO and the gameplay is different
To the "fucked up" point system: U get exp as normal, atleast on TDM, but u also get exp on your guns, so the stuff u can get to your guns (not the attachments) but something called Proficiency, like lower recoil, flinch when u get hit is lower, longer range etc.
U can also pick between 3 different classes
Assault: U get killstreaks that punishes the enemy like Predator drones and Pave Low and the killstreak reset on death
Support: U get killstreaks that helps ur team, with Uav's and Sam Turrets. Your killstreak doesnt reset on death,
Specialist: U earn perks through kills, so u get perks if u gain kills, so if u have the required killstreak for the last perk, you gain 6 perks (3 with the weapon and 3 with the class you play.)
MW3 is pretty good, the gameplay is good, and i think Mw3 is better in gameplay than bf3, but Bf3's graphipcs cant be matched