So happy to find your post! I just posted this question - how do fencesitters have fun anymore at WDW??
Start by booking "off season" and enjoy the lighter crowds & cheaper prices.
Check out the extras you can do. We loved the segway tour in Epcot. I think next up for us might be the train tour. It is a bit early in the day, but looks interesting. We haven't brought ourselves to do a full day tour yet.
Enjoy the good food. There are some good restaurants on property. We are saving Victoria & Alberts for my 45th birthday

. There is Wolfgang Puck's place, Kat Cora has a place on the boardwalk and I think there is a steak house in the Swan or Dolpin. We also like Ragalan Road, Coral Reef and Paradiso 37 (sit out on the deck if you go - lovely view!).
If you head over to Downtown Disney there is the Characters in Flight Balloon & La Nouba plus I heard they are putting in an upscale bowling alley.
Time your trip to special events. Spritna mentioned
MNSSHP and I have to second that. Don't miss the parade -- we aren't parade people but the Headless Horseman & the Grave Diggers make it worth while!

Food & Wine is a lot of fun and they also have many special tastings & events. We did the dessert party last year & a tequila tasting both of which I would recommend. They have the Flower & Garden festival in the spring, the Christmas Party and in the spring at downtown Disney is the Festival of Masters (art show).
Finally just enjoy being able to go at your pace & do your own thing. We rarely do rope drop, have no qualms with taking 1 1/2 hours in the middle of the day for a meal, and can ride what we want when we want. Want to stay on the TTA for 3 loops, no problem. With just two adults there is less contention about who can/will ride what, who wants to go/do what & working around nap time, tantrums and picky eaters. So enjoy the parks stress free.