The actor who played Iroh said he didn’t want to imitate the OG Iroh out of respect for Mako (the original voice actor). I think it was the right decision. This Iroh grew on me with each episode.
I hear ya and I agree that he shouldn’t imitate him but I think he’s missing the spirit of the character right now. Sokka isn’t a 1-1 imitation but he still feels in character but iroh hasn’t done anything very iroh-like yet imo. Hopefully he grows on us too though!