Well, they got rid of it in California...
Because DCA actually has stuff to do (TSMM, RSR, ToT, Monsters Inc, Aladdin, Animation Academy, Soarin, Grizzly, California Screamin, Mermaid, Sky School, WoC, Tough to Be a Bug, Red Car Trolleys, etc), so it wouldn't hurt the park to get rid of Muppets. It's Tough to Be a Bug also fills the 4D movie void in its own cohesive mini-land.
DHS can't afford to lose a compact, kid-friendly attraction until at least the Pixar expansion is complete.
Plus, with the new Muppet show coming up, it would be in Disney's synergistic best interest to do some sort of Muppets mini-land. Retheming Mama Melrose's/Pizza Planet and bringing back Mobile Labs along with Muppet M&Gs would be a cheap and effective way to keep DHS afloat until the big stuff opens. A Muppets mini-land could be done for $50 million if all they do is reskin existing locations and make some costumes for M&Gs.
I just don't see why they would close MuppetVision when Pixar appears to be taking over Backlot/Animation Courtyard, and Star Wars Land could easily take over Backlot Express, Indy and the expansion space behind it. Muppets really isn't hurting anyone where it is.