Wow, I'm surprised there is so much BF4 Single player support on here. Even if you do like the campaign, are you honestly going to play it more than once? Yet unfortunately the developers will be forced to spend the lion's share of their time and money on the single player, almost always to the detriment of the multi-player.
Of course there are so many dump trucks full of cash headed towards DICE that it won't really matter, but it's still slightly annoying.
TL,DR: Boo, Single player BF series supporters.
Also if you played BF1942 and were looking for single player...for shame! The point of BF1942 was to run the enemy over with Spitfires and Zeroes. Occasionally, get into a tank and wreak havoc. The End.
PS. For comparison, I realize that DotA/MOBA games are not for me. Maybe multi-player oriented FPS/vehicle games are not for some people also? Something to consider.