They have changed a lot on the multiplayer. Pick ten is a very nice modification on load outs. weapons are not as overpowered. the change in ghost prevents a lot of camping. I can see why you may like the new modernwarfare series. they're new iw 4.0 engines.  This one is a modification of the 3.0 engine based off of cod4.  I felt the same way when the game first came out. Give a chance and it will grow on you.