Unable to upgrade your stronghold.

Molag bal alter has no purpose! Cant even pray at it for a blessing.

Harkons 2 court members who hate eachother and tell you not to trust the other. Seemed like you would of had to choose who to trust in a cut quest
.
Most npcs still dont address you as the guild leader.

Lack of choice in any of the quests, Why couldnt I side with harkon? He had no reason to really kill me. Bethesda make him rage at end so they wouldnt of had to make extra work for a choice.

Vampire faction is worse than companions for pacing. Harkon gives you 2 quests and then you kill him after those.

I wasn't even sure when I could say I finished the vampire story. It was a tad anticlimactic.

Yea I couldnt believe it either, Serena: Its over.

Thats it. no party and none of the other vampires care harkon is dead. Even the ones that wanted to try to get the throne. How the hell did they fail at the end with this dlc when they had 7 months -.-

Those Vampire quests take a lot longer than Companion quests, though. You go to two whole new landscapes, and it's more than two quests. I do agree with the 2 court members not having some type of interaction quest beyond the one where their servants kill each other. I think they are also the only ones who don't address you as guild leader and maybe Serana.

I also wanted to side with Harkon :/.

I've been with Beth, xbox style, for so long now I've just taught myself how to pace their games properly. Little fast travel, make sure to take breaks in between missions to do radiant quests, and don't feel bad about getting lost on another quest for a while. While I do agree their pacing could be better, and an option to side with Harkon should be available, I've just grown calluse to the little pebbles in the shoe.

Also, not fast traveling between the vampire Castle and Dawnguard ... uhhhh god it's like the Fighters Guild of OB all over again! Why is it soooo far?!

Same here, I was shocked when my characters only words to say was "you wont win harkon" or somethig like that. I Wanted to side with him! he was my master not serena. I got no idea why harkon calls me a "pet" in the final encounter. I had been loyal and respectful to him all the way through and would of betrayed serena if i had the chance.

There probably is a cut quest between the aides. Just like the cut quest between Falion and the Jarl in Morthal. It'll be fixed and added with mods once people see it in the creation kit in 28 days.