I wonder also, who is going to voice him in season 3. Maybe they should write him off the show, have Zuko join the gang as Aang's teacher, leave Iroh behind to run his tea shop, so we won't have to listen to much of someone else playing Iroh.
I don't know any older actor that could capture the emotion, that Mako did. I heard, the new guy was an understudy of Mako at one point.
The "Tale Of Mako" short, was very good. The ending was so sad.