I just don’t think attractions like Muppet Vision attract enough guests for them to serve as a release valve. I hear you, and think the solution at DHS is to create more areas that are pleasant to spend time in because right now it’s the ugliest park at the resort and offers the grimmest vibes.
But Star Tours, Mickey and Minnie, Smugglers Run and (to a degree) Midway Mania all offer D-Ticket and lower experiences that help mitigate big draws like Tower of Terror, Rise, Rock n Roller Coaster and (in the future) Monsters.