Hello, I have some very specific feedback on catalyst. Please note what I say only applies to PvE (mostly in the context of high-end PvE - Raids). Also I won't talk about "this does too much dps or too little dps", I believe the game has a big balancing issue in PvE that far transcends the new elite specs.
First of all I want to say this is the class I spent the most time with and hammer is incredibly well designed, props for that, very very interesting and fun to play.
First piece of feedback is about hammer 3, if possible it'd be nice to have a (very) small CD from spawning the orb to grand finale, to prevent accidental double use. The class is very intense mechanically, which is amazing, so it would be welcome to have a 0.1s or so now that it has no cast time just so you don't end up using the grand finale when you didn't mean to. I understand if this is deemed inelegant or maybe I'm the only one who encountered this issue, so maybe this might not be the best idea.
Secondly, about the elite. This I'm confident about. I really like this skill, but in PvE it needs to be on a way lower CD to allow you to really make interesting adaptations to your rotation. It is very fun to have the possibility to double your damage skills and avoid auto attacking on a burst window or doubling your cc on a break bar, it seems designed to promote being good at reading the situation and improvising which is amazing, but it needs to be accessible more often to really feel this way. With such a lengthy CD you may end up only using it once for one purpose in the entire encounter, which makes its flexibility hard to justify when you could just run FGS.