I've always found this a bit strange. In interviews leading up to SB, the devs specifically flagged WAR's ability to stance dance without penalty (i.e. no GCD or resource cost) was one of the big advantages that promoted its use over the other two tanks. When the devs tried to change it (i.e. add in a resource cost), everyone lost their mind over it. So that was a no go.

What was the old mantra again? "Don't nerf WAR, boost the other two tanks up to its level?"

DRK has a GCD cost to stance switching. DRK has a resource cost to stance switching (18% of your resource bar, in fact). What this thread is recommending is the removal of one of these two penalties. The resource penalty still remains. In other words, they're asking for the stance setup that WAR had at the start of Stormsblood. You know, the one that everyone complained made WAR too hard to play?

Even if Grit was oGCD, it would still be weaker than the present implementation of Deliverance/Defiance, because of the difficulty that this game has in disengaging buffs (think pre-SB Cleric Stance).