For Disney, the idea of ‘everything matters’ outweighs restoring the OT to it’s original release cut. Disney wants everything to ‘fit’ both stylistically and in effects. I would wager they would be more interested in updating the SE SFX to fit in with Rogue One than from removing the SE changes. In fact, I bet they have a higher priority on making changes to the PT than working on a OUT. The SE is the canon they operate around now.

The only thing that makes the OUT seem likely is the preservation Disney is doing on the original footage. Archiving the OT gives them the opportunity, but I doubt they will spend any extra money or effort on putting the original cut back together.