I'm still not vibing with him.
My main two teams are,
Albedo, Zhong Li, Yelan, Raiden
Venti, Diona, Mona, Ayaka
I replaced Venti with Kazuha but Venti is so clutch at dragging enemies into the vortex that it just knocks Kazuhas ability to do so outta the park. I like Venti so much more. So then I just took out Diona for Kaz but her sheild is too great, I love shields in this game. They're mega useful.
Then I went to my other team and took Albedo out for Kaz, I didn't see a significant increase in damage to out pace Albedos off field damage. Kazuhas burst also doesn't last long enough nor is is up enough for my liking. I gotta say, I'm super unimpressed after so many people talked me into him. Everyone was like, he works on every team, you can't go wrong. Yeah, you can sorta set out his burst and forget about it but it's not up long enough. His elemental skill feels wasteful, barely pulls what I want it to, wastes time with his sorry excuse for damage on the plunge attack. I kinda hate that I felt over hyped for this guy. I don't need him and although I didn't break the bank for him, he feels like a waste of a pull.