Woz is BGH's big investment. There's been no motivation to spruce the park up to now because they weren't ready to sell yet - they hadn't done enough to make a profit from it.
In the next 12-18 months, I'm guessing we're going to see a lot of effort made to fix that (hopefully including Roxy).
They're going to be in a position to sell and they can't sell WOZ if the rest of the place looks like dogshit.
Things I would do:
Reintroduce a pre-show to Roxy - similar to Shrek where it actually introduces the story, rather than just having it a dark holding area for the next group of guests. Use it for something. Upgrading or replacing the seats in theatre would be nice, but not essential if they're still functioning.
Get all the shuttered facilities online - Stars Cafe, West Burgers etc.
Return Showcase to a proper Show to take some load off attractions and offer something else when maintenance or downtime impacts the park's capacity.
Turn Doomsday area around and chuck in a few small flats. Honestly even a 'scrambler' style ride, (suitably themed of course) would be preferable to having Doomsday sit and rot. (Longer term i'd see SVU rethemed back to western but for now the cheapest thing is to keep current theme and get a new ride - or two - in to replace the hammer). You could probably fit two small 'scrambler' sized attractions in that footprint.
Ditch HWSD and Showtime in favour of a show that is more than just 'driving in circles, the show'
Return intencity to guest accessible space. restore dodgems (ick) or utilise the space for other purposes - something i'd love to see is perhaps a mini "special effects" show (done more like convention stalls rather than an actual 'show' where one stall has a green screen, one has a Mo-Cap set up. (There's more to flesh out on this idea which maybe i'll write if i find the time)
Flesh out kids a bit more. Use the other side of LTRR shed for some sort of dark ride, or an ariel's grotto style area. Again, returning previously guest accessible space back to the guests.
Open Chinatown. Theme it to Yellow Brick road. Before anyone says they've already got a yellow brick road next to superman, there is more than one road.
And the majority of Oz were matte paintings, so get some talented artists in to paint the walls of the alley and boom, immersive Oz Yellow Brick Road.
You could even have the artwork progress, cornfields, apple tree forests, poppy fields before you round the corner and the big emerald city is revealed...