Maybe they should do a thing when Vampires and werewolves, don't fight but work together to achieve a goal. The King of Worms could call all vampires, draugr, werewolves, witches ect.
Personally, I wouldn't want that, because
that's what's going to get people up in arms about werewolves and vampires being cliche as you keep mentioning in other threads. I'd rather they keep the two separate, and have them interact with each other as little as possible. Having members of a faction be a vampire or a werewolf is fine, but having the entire population of both groups working together is something I'd rather not see.
I personally wouldn't mind if they were considered non-canon but since that probably won't happen, I'm just going to suggest that they remain in the background, like beast legs VS humanoid legs. We should hold on to the lore that has been present for years and not let this lapse of judgement muddy the originality of the Vampires in this series.
Personally, I'm still holding out for beast legs coming back. I don't really see why it would keep people from having armor/footwear for the beast races, especially now that we have the ability to smith our own gear. If our character's an Argonian, they could just make the armor in the same style of the Argonians. Same with Kahjiit.
Carrots was right, at least with me. I personally wouldn't have minded the Vampire Lords (though I don't imagine I'd be giddy about them either) if they were included in addition to lore-abiding Volkihar. They look like they have some pretty fun abilities (and once I get this game on the PC I'm going to give my vampire Persephone the Vampiric Grip and Bat Form abilities to her human form if possible), but the Volkihar are incredibly original and I'd much rather we have gotten them right away in favor of both the copy pasted vampires from Oblivion and these new Vampire Lords in Dawnguard.
Would it really be that hard to create three different strains of vampirism? They did it in Morrowind. Granted, the differences weren't nearly as robust as what I'm pushing for, but they were still there.