You took some very questionable talents there.
- 3/3 Ravenous Dead is no way a tanking talent; 3% STR is not worth 3 talent points for tanks. The only build that are justified for taking that is unholy (for ghoul buff) and blood (just so they can go deeper and get necrosis+BCB, plus they have a lot of STR multiplier)
- 2/2 imp Blood Presence... A typical tank doing 3-4k DPS will heal 120-160 HPS. ONE Rejuvenation tick is 2.4k every 3 seconds - that means ONE Rejuvenation heals for 800 HPS. Seriously, 1 SINGLE Rejuv from a SINGLE druid heals for 5 times as much as your 2 talent points. That talent is useless.
- I have a mixed feeling about Mark of Blood. 4% of your HP is really not that significant, considering that you heal 15% of your max HP everytime you DS, and heal 20% of your max HP everytime you Rune Tap.
- Hysteria is nice to buff the DPS, but at this level I would be more concerned about holding threat, and your build is very lacking on that department.
3% strength or 9% critrate on heart strike that I'll rarely use? Both are mediocre threat talents, I suppose it's what you prefer. Like I said, I went for 1 point in Necrosis which is definately a better threat per talent point then Bloody Strikes or Subversion. Since it affects your runestrikes as well.
imp Blood presence. Like I said, its a crap talent, but it heals you nonetheless. For Vezax you want to alleviate the healers as much as possible. So if you can keep your threat high enough then why not?
Vezax is a dps race. Your dps needs to be high enough so that your healers dont go oom before the encounter is done. I'll grant your critisism on Imp BP is warranted if your threat is suffering, but there is no excuse to miss out on Hysteria for 1 measly talent point. A feral kitty can do about 5.5k sustainable dps on vezax easily, most will do 6k. That's about 15k dmg for 1 talent point and you can pop it twice, but you prefer 3% crit on HS you use about once every rotation? And I haven't even taken heroism/bloodlust into account, which should inflate that 30k dmg to even more.
I don't like Mark of Blood much either for a generic tank build. Bosses hit too slow for it to matter much. But again, for vezax it's a bonus. 45k hp buffed is not unusual for a Blood tank, which means the boss heals you for 1800hp every time he hits you.
At Vezax p1 I'd ideally want to get by with shields from pallies/disc priest and omen of clarity procs from the resto druids. Sometimes in 10m vezax hm that's enough to keep me alive for entire p1 and the healers will have spent the minimum amount of mana on me. I understand this won't be enough in 25m, but neither has my threat been an issue there and we dont even do vezax25 on hardmode where the real threatmonkies (locks/boomkins) need to conserve mana for p2. So I opted for max survival build
Your post + mine should give any1 a good idea on what spec will suit his/her guild the best I suppose