Freeze would be perfectly salvageable with some kind of tweak to give it a legitimate place in a BLM AoE Rotation. Even if it simply gave Umbral Hearts under Enochian and effectively replaced B4 in AoE, that would give it some purpose.
Sleep is going to remain useless for virtually all content unless SE reworks hard CC, so...yeah, it's going to stay useless except in some solo leveling, which is probably a fraction of an average player's experience in the game.
Scathe wouldn't be such a disappointment if it had a bit of potency to it, but I would prefer to see it reworked in a way that made it a legitimate tool rather than an absolute last resort "literally-better-than-nothing" option for extended movement. As others have suggested, it could be as simple as extending UI/AF timers by a few seconds so that stacks aren't lost as with Transpose (not a fix that would be likely to improve things much at the highest levels of play, but almost any change to Scathe would be an improvement of some kind).
