Did they replace the light bulbs during the rehab? I don't know what work was being done under the scrim, assume it was roof related or something and don't know if they even touched anything else.
I will say one thing. Light upkeep had been much better in recent years across WDW property as a whole. You can still occasionally spot single digits worth of broken lights within strands of hundreds, but the situation is far better than back in 2010-2014 when it was common for 50-80% or more of an entire strand to be broken or switched off. Hopefully they don't slip again.
Many of the strands of trim lights across WDW were actually retrofitted with LEDs during the past 5 years or so. The entire facade of Grand Floridian and most if not all of the International Gateway hotel facades are LED now. Same goes for Magic Kingdom's bus terminals, monorail station, at least some of the boat docks and I think the large TTC ferries. Even the facade of the Crystal Palace as well. They look good too, it's easy to mess up LEDs but they picked an appropriately "antique" warm amber color. I assume the intent is to continue gradually retrofitting old incandescent lights to LED.