I watched some of the newly released multiplayer footage, and it looks really similar to COD4. The UI is basically the same, with XP bar and rank progress. only now it's WW2.
Ofcourse they added lots of different perks, and streak bonuses like attack dogs.
To me, that sounds awesome, I don't need them reinventing the shooter, they are building on the fantastic foundation that Infinity Ward have created with COD4, and for me, that's all I want.