I'm coming in on Sunday with a boatload of family members (in-laws)! It won't be nearly the relaxing adult trip that you have planned.
My 2 cents:
Day 1, go to Epcot on monorail, enjoy a bit of F&G festival fare, ride Cosmic Rewind. Maybe check out
DVC center in Canada, definitely enjoy The Voices of Liberty at the American pavilion (I never miss this).
Exit IG, ride skyliner to RIV. Get Gelato by the water and check out the grounds, go to lobby for a coffee and look in the (small) gift shop there.
Bus to MK, maybe walk back to room for a break. Boat or monorail ride to Poly that evening, eat at Wailulu in Poly Tower, check out GCH lobby and the (large) gift shop there. Could monorail or walk to VGF from there if desired.
Day 2, Personally I'd spend some time at MK, then boat or bus to WL late morning. Check out lobby and gift shop at CCV and the lobby at BRV. Eat at Geyser Point.
SSR evening/night. Eat at Disney Springs.
Probably much more detail than you wanted or needed