Their main goal seems to be to prevent Flare Star from falling off. Without a timer you don't have to switch to UI when the boss becomes untargetable etc. so you can just continue your AF phase where you left it.
Paradox will need a potency adjustment, I am more concerned about Despair. It was a finisher and a disengagement tool. Flare Star took it's place as a finisher and now you don't disengage anymore, so you don't need a disengagement tool. Despair becomes button bloat now.