I agree it does not need to be done if its full of holes but if its done well with all loose ends tightened and so on then expanding on the story is always good if you don't expand on sonething eventually it gets stagnated, I am going to reserve more critical judgement of this expansion tor when I actually play it.
My point wasn't so much that I think the Dawnguard NPCs will be lacking, but rather I think Dawnguard has probably caused a lot of other NPCs we've seen to be lacking.
My point was that Bethesda seems...undisciplined. If they get bored with an idea or concept, they just drop it. If a new idea comes along that they like, they devote all their time to it (and may drop it again in the future when it becomes boring). While this is, in a sense, perfectly fine, they should at least have the discipline to tie up loose ends in a believable way with a natural transition.
A lot of people are saying "it doesn't break lore!!" Yeah ok, let's get real here: with the godlike ability of the Daedra, it's pretty hard for ANYTHING to break lore. Any time something outlandish happens, Bethesda can say "Azura did it" as the excuse.
But more importantly, it lacks natural transition. We've NEVER heard jack about winged vampires or demonic looking, all powerful vampire lords. Some say "well they've been hiding!!" No see, that doesn't matter. If you're the WRITER, you at least provide some clue for the audience, for example maybe briefly mention this strain of vampire in a book written by a man thought to be crazy or the like.
But let's take a second and look at factions and groups that seem to lack natural transition:
-Volkihar are M.I.A.. Reported to be the Skyrim brand of vampires in Oblivion, they're now suddenly missing entirely without clues as to why or how.
-Werebears were famed for being a real problem in Skyrim. Again, they're suddenly missing entirely without explanation or clues as to why or how.
-This new vampire strain is suddenly here out of nowhere, hopefully they'll explain why or how.
-Redguards have gone from detesting magic in Oblivion with one NPC's entire personality type being that he was the token black guy for the mages guild, and he went out of his way to make it perfectly clear to us that redguard hate magic. Another Redguard necromancer found in the game had to flee Hammerfell because the people there wanted to kill him for practicing magic. Come Skyrim, Redguard utilize magic no problem. The argument again is "a lot of time has passed!!" yes, but Bethesda left behind zero literary tools to suggest such a change was coming. Hell, they pointed us in the OPPOSITE direction, saying they hated it. Now they use it and Nords hate magic....Very awkward transition.
-Shadowscales. They're presented to us in Oblivion like this interesting new concept of Argonian culture, then next game Bethesda says "NEVERMIND THEY ALL DIED LOL." Like wtf?
-The Vigil of Stendarr are just kinda....there. They do nothing. What's the point? Is this an idea that was never fully fleshed out?
Bethesda seems to get bored with ideas and isn't afraid to move on and try new ones. This is fine, but again, at least leave behind REALISTIC TRANSITION for us to follow. Things like the Shadowscales and the Redguard adopting magic, that's the sort of thing where it's best if Skyrim shows slight usage of magic by redguard (more specifically, it shows them as a culture trying it for the first time and admitting they'd like to experiment with it more) and where the statement on Shadowscales isn't "I'M THE LAST ONE LOL" but rather "my homeland is starting to walk away from the concept of Shadowscales, no longer forcing such children to become assassins." THEN in TES VI you can make Redguard full-on adopt magic or make Shadowscales extinct if you so choose. Things like the volkihar and werebears? Those just need to be here; that's a commitment you basically made when you wrote them into the lore without providing any clues for their absence in Oblivion.
Natural transitional flow and commitment is all we're asking for. It's quite a simple request. Right now though Bethesda is handling these factions and groups like a child who gets excited over the idea of building a treehouse, but then annoyed at how hard it is so they leave it as a tree....platform. Then they get excited about learning to ride a skateboard and whine for a really expensive brand of skateboard, but then they ride it and fall and scraqe their knee and never try again and the $200 skateboard collects dust in the closet. Then they decide they want a pet dog, but after it grows from a puppy to a full grown dog it's no longer cute and they neglect caring for it. Then they decide they wanna join the baseball team but but but.....
A LITTLE commitment to your own lore, please.