I've also seen countless people who want new werewolf content "Vampires are getting new content. Why not werewolves? Its only fair."
Well, I've got news for anyone who wants more than a "vampire-only" add-on. You already have all that stuff.
Vampires don't have ANYTHING in Skyrim. You can become a vampire or you can cure yourself of the disease, and sure it gives you some pretty neat powers, but that's about it. There is no vampire faction. There are no vampire-related quests. Its not story-related in any way. In a way its almost on par with an Easter egg since assuming you DON'T know about vampirism you could easily cure disease and be done with sanguinare vampiris before it runs its unholy course...not to mention it was damn hard for me to find a vampire nest without consulting my guidebook and harder still to catch it because of my Argonian blood.
Werewolves have a faction. The Companions ARE werewolves and they're also the Fighter's Guild of Skyrim (need I remind you how HUGE the three Guilds are canonically?) There's a whole bunch of quests for them and they're all about being a werewolf, killing things in werewolf form, and generally doing werewolf things. You even get armor (granted you can't wear it in beast form, but at least you get a transformation)
Mages have the College. Again, BIG. Its a guild. It has a bunch of quests. You do mage stuff. There are spells and staves and robes and lots of mage items. Playing a mage comprises a whole THIRD of ALL the skills available in-game. Including all those skills, perks, spells, items, and quests that's a lot more content than you get from lycanthropy and vampirism COMBINED.
Are you starting to get the picture? Vampires are lacking content. Correct me if I'm wrong, but we have no faction, no quests (except for The Cure), no items, nothing. The only thing vampires have going for them is the powers you get from it...oh and dreading that moment when you exit fast travel only to discover you're now a blood-starved (stage four) vampire and all the local NPCs are now hostile to you.
This add-on corrects the lack of vampire content. Now we get a questline, a faction, a cool transformation, and hopefully some new powers or items or...or...something!
Everyone who wants more of the content they already have is just being greedy xP

