Yeah, they're releasing these guys super fast.
As general note on each character (based on what I've seen):
Fugo: Does huge damage with meter, like 3 bars = 90% gone. I hear he doesn't have much in terms of mix-ups, though (could be wrong).
Cool Ice: Also does a lot of damage. Has a unique stand on mode where all his attacks are unblockable void attacks. All his void stuff is controlled by the "Cream meter" which drains as you use them. One thing I've noted personally is that he is kind of linear, and all his attacks are physical, so Diavolo's counters/GHA kind of chews him up.
Narc Anastasia: Don't know much about him, other than he seems to have a lot of dirty, dirty ticks/traps (based on others' impressions).
Also, if there's anybody out there that played the imported 1.4, was Diavolo's GHA always affected by rumble mode? Because in rumble mode it does like, 60% now.
