Cut content.
Like the ice diving dragon in the trailer.
Like being unable to upgrade forts.
Like half the npcs in the vampire fort being unused and dont even know your the new leader.
The ice diving dragons ARE in the game...there's actually two of them. You find them in the Forgotten Vale.
You CAN upgrade the forts, it's just not what any of us expected. You can repair the walkway to the Courtyard in Castle Volkihar and Forges, Enchanting Tables, and Alchemy Tables get added to Fort Dawnguard. As I said, nothing like what was alluded to, but it still technically qualifies as an upgrade.
And the only NPC's in Castle Volkihar that don't seem to recognize you as the leader are Ornjalf (or whatever his name is) and the NPC's that just talk about their always being a feast yadda yadda.
The other NPC's openly comment on the fact that noone will forget you were the one to kill Harkon, you're the superior Vampire, you are the Lord of the Castle, etc.
So what were you saying about cut content?