MK - Your plan for fireworks and Be Our Guest is perfect - these are basically the only things that are worth the time for us at MK. Otherwise, we just feel like it’s a copy of DL, with less soul, somehow. We found 7DMT to be incredibly underwhelming, but it is unique. If you’re getting
Genie+, definitely book it to avoid the 45-120 min wait.
AK - Pandora rides, Everest, Kilimanjaro Safari, Festival of the Lion King show, and spend some time just walking around looking at the animals (Discovery Trails) and theming (get close to the Tree of Life). That park is just insanely beautiful. Food: Satuli Canteen, Tusker House, Tiffins, or Yak and Yeti. This park closes early, so make sure you have a plan for the evening.
Epcot - Guardians is the best ride at WDW, period, if you can handle coasters. Book an Individual
Lightning Lane at 7 am if you miss the 7 am virtual queue (was gone in about 1 second during our December trip). Someone recommended going to Epcot twice during our trip so we could ride Guardians again, and it was great advice! Try to get a reservation for Space 220 Restaurant. See above for other recommended rides, and Ratatouille was also cute. Check out the World Showcase at night.
Have fun!