As much as I want Animation Courtyard bulldozed, you're right from an ops/business point of view. DHS has no attendance problem (capacity issues, but not attendance-wise), so they have no incentive at the moment to update the place.
It does look like this is going to be a short-term solution to helping capacity in the park while drawing up plans for the long-term. But right now, DAK is desperate for something to keep people to park close. Can't imagine they're happy about people skipping dinner at Tiffins/Yak & Yeti/Tusker House because there is not enough at the park to keep them late.
I'd imagine we'll get another attempt at a nighttime show whenever these new areas/rides open as well as a big marketing push.