But that's the rub... the removing and relocating the backstage infrastructure behind Animation courtyard is
exactly what would benefit the park the most by expanding the footprint of guest areas and helping to connect Animation with RNR (fixing the deadend for Sunset Blvd). If it were DLR and they had to squeeze in something, they would have no problem with moving heaven and earth to make use of every possible square inch. DHS deserves the same consideration even if it is costly.
I recall from when the big DHS revisions with TSL and GE were first being planned, there was also another "phase" of expansion - I think it was conceptually an Indiana Jones area - that
@marni1971 had talked about for the Animation Courtyard area. So, doing something in that area has been thought about for a while and I'm sure they have plans in place for how they could address the backstage stuff there to make it work.
They do have usable land on the other side of World Dr. It wouldn't be the odd to just put backstage stuff there with an elevated walkway over the street for CMs to get to the park.