Carbuncle.Gilder said:
"Enhances your weapon skill power with each normal attack you land, but prevents you from dealing Critical Hits."
Probably no effect unless you land X amount of melee hits first.
Been doing this. After I do one last Raging Rush, I'll use Restraint right after, build up TP, and then berserk/aggressor/warcry > King's Justice. Even after building TP up to 200, I didn't notice any major changes, at least nothing to compensate for the loss of crits.