I dont actually think its working as intended and really it should never have gotten into the game.
Its the wrong way to go around doing what it needs to do.
Seriously there where far better ways to increase dps for melee fighters than upping PoT and honestly for raids I see where the balance between tanks fails but in group instance it just become OP and any one change that increases all fighter dps is just going to blow the whole problem out of proportions again.
Why not make it a buff that added 2 more attacks ( Like MA so from 6 to 8 attacks) to auto attack either ranged or melee, that made it impossible to tank with so no tanks are tanking stuff in the stance. ( and with maybe the odd dehate)
Rather a simple fix evey tank would benifit from.
Oh if 2 is not enough make it 3 and there is ur 30% increase in DPS