There are a lot of problems with prot warrior right now:
Your survivability is terrible. Ignore pain is not a spell and shield block mitigates almost nothing.
Threat issues. If you are pugging or playing without a hunter or rogue, you constantly lose aggro and are forced to run around taunting and fighting for aggro, even worse on aoe.
Legendaries being borderline useless.
I hear a lot of complains about fury, but prot is definitely the worst tank spec atm and is in drastic need of buffs at least to amount of damage it takes.
I am well aware of all that my good friend. Just thinking of the ways to boost warriors up since they are so hard to play
Better mastery, more block chance form it, more attack power from it.
Thunderclap, shorter CD baseline, and spread on bleeds instead of revange. Revange should be just rage dump for dps, not the must spam spell to keep agro.
Ignore pain actualy ignoring some pain… DUUUUUUUUUUUH!!!
Mastery should go full percentage as blockchance increase, literaly solves the problem with warriors musthave haste, couse we all know, no haste no shield block no shieldblock no defense since IP doesnt do anything