4th Ed suffered greatly from negative publicity. I think people were wanting something else from the vamp class--that it not be a class at all, among other things. But if you wanted a Vamp race, there were the Vryloka.
One of the best ways to improve the Vampire's survival was to take the Durable feat at 1st level, which gave 2 extra surges. In fact, I'd say it was essential to the character's survival.
Thanks to "Auspicious Birth" and "Born Under A Bad Sign," Con was frequently one of my dump stats. Wisdom was usually the other (wise people don't go into dangerous places and put their lives on the line on the off chance that they will be the lucky ones to come home with wealth and fame--only the foolish and/or desperate do that sort of thing)
I agree about the problem with bad publicity. Especially after Essentials, where Mike Mearls did piss off most 4E fans with the "going old school simple martials", there was even more negativity about 4E and often even cool ideas, like the vampire, did catch stray bullets.
Yes thats the 2 Backgrounds I mean and I agree that they help the early game vampire a lot, but needing to rely on backgrounds is definitly a bad design. Especially since not everyone was playing with backgrounds and not every GM allows backgrounds which give other things than skill bonuses, thats why I would make that just a class feature. It does not change the best case (optimizers with this background), but the weak feeling cases (people with any other background).
Durable is not really that good on the vampire though. You never want to use your own healing surges, else you cant make use of your short rest full heal ability (and need to lend healing surges from others), thats the same reason why the level 13 feature is not really useful.
You want to survive a combat with X+1 healing surges, where X is the number of healing surges you have. If you do, then you can heal full in the short rest without needing a healing surge.
And increasing X to a bigger X does not change this fact. If you come out of a combat with less healing surges than X you are in a bad state anyway. And you need to get a healing surge from someone else.
Sure it is a positive if you can go more into depth (X-4 instead of X-2), but the lower you are below X the harder it is to get back to X+1.
This is also why getting the 2nd blood drinker is so important (and why it should be at level 3 not 7), since it makes it a lot easier to get to these X+1 healing surges. (And also the Level 9 and Level 15 daily power help (not sure why the extra healing surge was not on the lvl 1 daily though, that would also help quite a bit.).
I would say at level 1 Toughness would be more helpfull. (5 more max HP). Even if you can retrain it later raising your HP from 22 to 27 (or 28 if you can get 11 in con) or from 28 to 32 (with the backgrounds you meantioned) and the healing surge value from 5 to 6 (or 7) or from 7 to 8.