I’d get the future world update budget doubled (we can afford it, Star Wars and marvel are making a mint), leaveragr partnerships to get sponsors back to Epcot, fast track a complete overhaul of the crumbling transportation. New boats, busses, monorails and an expansion of the monorail to cover all parks, and start the ball rolling for an expansion out to MCO.
Work with universal and sea world to form an independent partnership body which say $5 from all tickets goes into. This is then used to find projects that benefit tourism as a whole between the three parks, providing things like free shuttles between each others parks, joint IP advertising, etc
Close down Blizzard Beach and Typhoon Lagoon (one at a time) for a complete redevelopment, retheming typhoon lagoon around Moana, and introducing approx 10 new rides in each.
Green lighting at least 1 new attraction per year in each park for the next 5 years, including land expansions at MK, Epcot and HW