The only thing Battlefield ever had over the MW series was the size of the maps. Trying to compete head-to-head in what has been the focus of the MW titles isn't going to do much.
Not sure what makes a game better than the other in this situation. BF has the fun factor, while COD has the graphics... I guess. Either way, IDK, I may skip this expansion... I'm not really for the indoor combat that is used in BF 3.