My thoughts:
Certainly a character that seems easy enough at first, but really difficult to master. It's not so much his combo potential but sometimes getting in can be excruciatingly painful. Not having any legit mids aside from F4 (which, seems to not be a true mid?) hurts him. I was playing a Tarkatan Alien today and all he had to do was just d1 my B3 (seems to trade pretty often against pokes) and my grab, and my OH option in B2 off of 21xxphase. Maybe I'm clearly not getting the timing right, but other characters seem to just kinda shrug off his normals and range. Smoke ball being really slow doesn't help. Meter is pretty much going to be used for hit confirms with EX Tele, EX Phase for wakeups and EX Bomb for confirms and blockstrings.
Playing against characters who have great footsies, or can keep you out makes it difficult as well. I personally think Invis is just a bill and while not terrible, is used sparingly and certainly not even in every match. Sometimes you need the damage and/or the vortex to keep pressure. Plus, to use the bar for EX Invis just seems to be a waste especially given how important meter is to this character and EX Phase.
His d3 just sucks, D1 isn't too bad though. T-Rex arms and a ton of highs off of standing 1, 2, F1 is not fun, given those are his fastest moves. Seems you can just kinda duck against Smoke unless you use NJP which has it's own risks.
He's not terrible, but he kinda is underwhelming at first and maybe once I play a ton of games with him aside from a few days worth my opinion might change, but he might be the weakest of the four right now. Anything he does, Scorpion can kinda do better tbh.
Has anyone figured out if EX Trident is even worth anything useful? It just seems to provide a bit of extra damage and starts up faster.