Restoring The Simpsons to its past glory
If they ever put me in charge of the franchise, I would declare EVERYTHING that happened post-season 10, and ESPECIALLY during the Disney years, to be null and void. I'd keep the events of season 1-10 as "canon", and age all the characters up a year, as they're pretty much played out everything they can at this point with Bart in the 4th grade.
That means The Simpsons revival would start with Bart in FIFTH grade (I'd give him a new classroom and teacher, but reference him having Mrs. Krabapple the previous year and ignore the recent seasons giving Bart a different teacher in 4th grade). Likewise, Lisa would now be in THIRD grade.
Since the awful later seasons "never happened", this means that Lisa would still attend the first church of Springfield with her family and is NOT some insufferable liberal know-it-all, Ned Flanders is still happily married to Maude, Marge's older cynical chain-smoking sisters BOTH have the hots for "MacGuyver", Abu is the regular cashier Homer talks to every day at the Quik-E-Mart, Harry Shearer would be back voicing Dr. Hibbert, and I'd ever bring back the long retired characters Troy McClure and Lionel Hutz, though you'd need a Phil Hartman sound-alike to voice them since Phil's no longer with us.
It would honestly be the ONLY way to make The Simpsons watchable again!