Hi James,
I noticed a couple of things...
First, it probably would be much cheaper to Uber rather than taxi on your MK day.
2. I think you're not going to be able (or want to) make it back from Busch Gardens in time for Wishes. Also, prior to your trip to BG book the safari tour for first one of the day. Hand feeding giraffes is amazing. They book fast so don't wait (If you decide to do it) until you're there. Book a week or so ahead.
3. I know you talked about Cindy's Royal Table. Perhaps on your MK day, do a late breakfast? Much less expensive AND you still get the royal treatment!
4. Are you planning on watching the electrical parade from one of the resorts? Grab a drink from the Poly and head for the beach. Very romantic.
And 5. Rivers of Light should be up and running on your AK day. I would strongly recommend obtaining an ADR dining package so you can see it, instead of Rainforest Cafe. It supposed to be amazing!