Not sure how Universal works - but the decor is a crew who are dedicated to it. The electric is like 3 people assigned to it from the normal operations and everyone else during major install is wokring overtime shifts from their normal gigs.
So.. like i've said elsewhere, stuff may NEVER get plugged in or wired right, but it's not usually obvious stuff. Moreso a wreath on a gate on a fake building no one actually ever enters at AK for example. Also if it was ever on and went out, a work order needs to be called in to do it. Since it's never been there before, most TMs probably dont know the process for getting it fixed if it broke.
They'll very likely have a walkthrough and sign off before media event, so we're still at the work-in-progress point.