I personally think that GAdv should concentrate on upkeep of the current rides and start adding a few new flat rides every season.
If they added two or three flats around the park in areas that once had rides there would be more for guests to do.
Bring back a Monster Spin/Octopus, Scrambler, Tilt-A-Whirl, Flying Wave, Enterprise and other standard rides we all know and love.
Reopen the Old Country section, get the Autobahn and Muzik Express up and running again. Rides like Scrambler and Tilt-A-Whirl would be great in the Old Country.
The big thing I would do is move Bugs Bunny National Park into the Looney Tunes Seaport area and combine them into Bugs Bunny National Forest.
Remove the Wiggles World area and add the Condor and Monster Spin and theme them for Movie Town.
From the area that is now Bugs Bunny National Park through Skull Mountain I would re-theme as Pirate's Cove. Rides could be added to the BBNP area and can be themed in a pirate or some sort of nautical theme. I.E. Enterprise could be called Whirlpool. Also Spinaker could make a comeback in that area.
But they shouldn't do it all at once. They should slowly add some rides to the Old Country first, re-establish that area and then make the big change of LTSP into Bugs Bunny National Forest. They could even put in a train ride back through the woods there like the old days.
Just a thought.