I agree on 2 abilities Freeze and Tri-Disaster needing a revamp.
Freeze needs to grant UI3 if anything it should also leave an after affect and act like Shadow flare so it has a better use over Blizzard 2 and Blizzard 3 making it on par with Flare. The offset can be either a 3-5min recast timer or can only be used when equal or under 100MP.
Tri-Disaster should be buffed to also increase the DoT time on DoTs.
Apocatastasis is very situational and we don't even know when it can or when it does not work. Personally if it gave a secondary effect like haste buff or a stat increase it would be a beneficial ability to throw in here and there between rotation.
