1. 10% parry to grit...so you want something -better- than Shield Oath? Haha
2. It's an off GCD attack that deals lots of damage. I don't have an issue with that if it gets a nerf to its damage to compensate
3. No issue here.

On Delirum: You don't always have a monk? There are other, similar debuffs that dont stack in the game (ninja/warrior share one for instance).
On Carve and Spite: Agreed. I think in addition, Blood Grit should be based on damage received--so its not so godly in dungeons, but more useful in raids and bosses.
On Tool Tips: Agreed