Many of these comments relate to game mechanics, not game content. The underlying game mechanics won't change with the game mode or the additional of more vehicles, 64 players, etc.
This game has been marketed for some time as a hybrid between the two games, not some ground up re-imagining of BF2. Hence my point regarding the engine itself. It's BF2 layered over BC2. How is it not going to feel more like the latter? My gut tells me that once we see some of those features from BF2 start to shine through on other maps / modes, it'll be a little easier to swallow.
Look, I would love to see a true evolution of BF2, but it's a 4 year old game. DICE would have to be brain dead to completely alienate an existing user-base for BC2 just to appease people who loved BF2.