Good plan! Epcot for sure you'll need two days, 1.5 if you absolutely must - World Showcase alone I could've spent a whole day in, and it's a lot of walking around the lagoon haha.
I skipped DHS entirely on my first trip, nothing really interested me except maybe they're Fantasmic and ToT, so maybe I'm not the person to ask for what to cut.
Indy also just has a more intense ride profile. It really throws you around in a way that even Dinosaur can't quite match, so I do tend to understand folks that prefer Dinosaur for that reason.