There are several things I would advise Disney Parks to implement for WDW in order to increase ticket sales, and thus all that in-park revenue.
1) Offer lower level blackout dated Annual Passes nationwide, not just in Florida. There are many guests who make 2-3 trips to WDW a year and would enjoy having an annual pass (which often increases their attendance), but aren't willing to fork out $900 or more per ticket... and who can blame them?
2) There should be Passholder lounges in each park. These could be places that allow guests to sit in comfortable chairs, enjoy air conditioning, grab a soda, water, tea, or lemonade from a dispenser, charge their phones, etc. Again, adding perceived perks generates increased buy-in.
3) There are many potential guests out there who simply cannot afford a trip to Disney World when tickets are running $100 a day and they've got a family of five. However, if there were half-day non-MK tickets for $60, you would likely have an influx of guests eager to get in there and spend their discretionary funds. These already exist for conference attendees, so the infrastructure is mostly there.