You're wrong on several counts.
First: Warrior's Thrill does NOT get calculated in Shake's hp percentage value, that's because Shake goes off of the TARGET'S HP VALUE otherwise Shake would be pretty OP. Warrior's Shake, if you bothered to read the actual tooltip, shields the target based off of their OWN HP. That's why Shake was buffed, PLD's Veil gives MORE shielding for free, WAR needs to buff theirs to meet it in value.
Warrior can spend Thrill, Raw, and Vengeance for 2 percent more shield per CD consumed.
PLD's shield is based off of the PLD's hp, which is about 14k shielding right now, which is pretty good. Compare that to the 12 percent of like a BLM's 80k hp... not nearly as good, but, it's totally instant to cast so there's that.
Also to clear something up because these forums love to be in the dark about basic skills and tooltips and how things work on tanking, but love to give their "advice". Passage of Arms can be instantly weaved in between GCD's to give the 15 percent mitigation to all dmg, this persists on the server tick, so you get about 5 seconds worth of mitigation, more than enough if timed correctly to lose no dps, so no the "Raid" as someone pointed out, does NOT "lose a lot of dps".
Another thing: Intervention is OP as hell. It's a FREE 10 percent on your cotank at nearly all times when it's necessary. You can keep spamming it as long as you are not actively being auto'd as you will have your other CDs up for w/e you need them for. That, and if there is a double buster you can buff it by having Sentinel or Ramp up for even more OP mitigation. That's insane, no other tank can do nearly as much for their cotank as PLD can for free. TBN is great, but it costs resource and if the DRK already has their DA proc, they ain't using it again till raid buffs are up or they need to refresh DRKside/spend mana.
Cover kind of blows now, but hopefully they have dps/healer mechs where u can use that like in O7s with the missiles.
The real brokenness of Veil: You can pop it a FULL MINUTE before it is needed, yes, so long as your healers are going to put something up to proc it, you can pop it 30s before that, so it goes on CD, then, the shield lasts for a full 30s again, that's INSANE. No other tank can do that... at all. You can have so much uptime on veil it's outrageous. double the uses of it than the other tanks stuff.