In general, I think the blue/gray color scheme is a lot more pleasing to the eye than the beige ("soundstage-color") buildings. It also makes those buildings fade into the background a little more, so that one's attention is drawn to other, more richly-themed buildings.
Regarding the Muppets theming of this area, it really doesn't create a true "sense of place" that fits with the new direction of the park. A "frenetic"-style design can work inside an attraction like MV3D, but spilling out into a more general area really makes DHS less immersive.
If they replace or re-facade Studio 1 Store, the area could feel like a real place that one is transported to, and that would be another step in the right direction for DHS.
Put another way, the area around MV3D reminds me of Dinoland/Dino-Rama: too much jarring, clashing, etc. Toning it down will make it jive better with the surrounding areas, and also just feel better to be in.
I think our love of MV3D and nostalgia might be getting in the way of our perception of this area. Objectively, these changes seem to make it less tacky and more aesthetic.
But this is all just my humble opinion, of course.