^^Well, The Muppet Christmas Carol was written by Jerry Juhl, who been the Muppets' head writer from The Muppet Show onward and had been part of Henson's creative team as far back as Sam and Friends. So despite the loss of Henson and Richard Hunt, the movie was still mostly done by the "authentic" core creative team. Juhl also cowrote Muppet Treasure Island and Muppets from Space, but TMCC was all his.
The deterioration of Muppet productions in recent years is as much due to the declining involvement (and 2005 death) of Juhl, and the drifting away of key performers Frank Oz and Jerry Nelson, as it is to Jim Henson's loss. Henson was the linchpin, but he built a strong team that was able to keep doing good work without him. But a lot of that team has moved on and been replaced now. Indeed, maybe it's my bias as a writer, but I think Juhl may have been just as much the "soul" of the Muppets as Henson was. I feel there's a pretty clear difference in quality between the Muppet productions written by Juhl and those lacking his touch.
The deterioration of Muppet productions in recent years is as much due to the declining involvement (and 2005 death) of Juhl, and the drifting away of key performers Frank Oz and Jerry Nelson, as it is to Jim Henson's loss. Henson was the linchpin, but he built a strong team that was able to keep doing good work without him. But a lot of that team has moved on and been replaced now. Indeed, maybe it's my bias as a writer, but I think Juhl may have been just as much the "soul" of the Muppets as Henson was. I feel there's a pretty clear difference in quality between the Muppet productions written by Juhl and those lacking his touch.