Some slightly more considered thoughts.
Blood Drinker: it specifically says 'extra damage', but lacks the weapon/implement keyword. Something that might be worth calling out for damage optimization.
Swarm of Shadows: The only bad thing about it is ongoing 5 which is piddly by the time you replace this at 15th level. But invisibility until EoYNT is great.
Dark Beckoning: it's a super-accurate attack against a NAD which may be worth calling out.
Hunter's Gaze: Yeah, this got downgraded by the 'we made CA stupidly easy to get' part of 4e. The +4 Intimidate might have some niche use in Intimidomancer builds...?
Feral Assault: I think this is actually red. Terrible power. I can't imagine any plausible situation in which I'd *want* to use this.
Strength of Blood: may be worth calling out it's a minor action, not No Action like a lot of the skill booster powers. Still, +5 is a big bonus. If we were still playing LFR this would be pretty good for all those in-combat skill checks at the Hard DC. In a normal game of course YMMV depending upon DM.
Unfettered Hunger: I think this should be black as long as you use it carefully; i.e. when you're in mop-up phase (and don't need/want to spend HS) or desperate (willing to risk not spending HS because you need the extra damage and mobility). Interestingly, this gives untyped bonuses that don't specify they are only for vampire powers, so it'll work with any attacks you have from any source. Shift your speed as a move action is really good, you usually don't get this for an entire encounter *with* bonus attack/damage also. All things considered I think the strong bonuses with the risk/reward part make it black at worst.
Form of the Bat: Agreed, prime swap-out bait. Unless you're in one of those campaigns where stealthy bat-form scouting is a gamebreaker, but we can't really plan for that.
Night Crawler: climbing at your full speed is surprisingly good, or should I said, climbing at half-speed (normal rule) is surprisingly annoying. Also note that by having a climb speed you become eligible to shift-climb which has niche uses.
Dominating Gaze: woo hoo, you only needed to reach level 9 to be a real vampire. *wink*
Gaseous Form: breaks dungeon exploration over its knee -- speed 8 + phasing is enough to phase across two entire corridors/walls. Or heck, double move and phase 16 squares, you're halfway across the graph paper now. If your DM is at all old-school he will grow to hate this power. Otherwise, power-swap bait.
Hungry Swarm: why is this only dark blue when Swarm of Shadows was light blue? Hungry does better damage and has a better rider (blinded).
Shared Blood: agreed, there are much better ways to give someone temps or a save. Shared Blood is super, super flavorful though.
Unleashed Fury: 4e never did know how to properly scale these types of powers, did they?
Vital Consumption: Sorry, but this is not making me like Unleashed Fury any better.
Gotta run, will comment on the epic level powers / class features later.