Unfortunately the only CC skills viable are ones used by several bosses and enemies that a player can't use(such as THM/BLM enemies using Breakga but the player gets gimped in the process) or PvP only skills. Or skills like Freeze and Sleep who only have true use in PvP and the occasional Fate.

Even harder when current mechanics boil down to kill all the things leaving no room for actual crowd control outside say a tank using provoke or a warrior using Holmgang or inflicting heavy on say True Heart.