I think Matt has to much on his plate character wise, andin the end that's going to only hurt the characters. It's not like when Jim passed away and Steve only had Rizzo and Bean Bunny. Matt has a huge role at Sesame, and he just started getting into Jerry's classic Muppet Show characters. Now I know Robin was recast, but what about the others are they to going to have to be recast?
I see what your saying about Steve taking 5 years to fully get into Kermit, but even in Chrimas Carol and Treasure Island Kermit and Piggy still had cimistry. Which next to Kermit and Fozzie's relationship is one of the key parts of Kermit's character. Now for a long time even as greattach as Steve and Eric were with Kermit and Piggy Kermit and Fozzie have really not been what it could be.
I know that for some none of this makes any sense, but I honestly and whole heartily belive these characters and most importantly there relationships with one another.