Last year we went while Epcot AH first began, split stay between YC and Poly, and HS AH was also available but it was on the same night as MK EEH. We opted against the paid events and it wasn't even a debate tbqh. Granted, we did have a longer trip (11 days) but even on a shorter one, personally I think it's absurd to pay deluxe prices and not take advantage of the one benefit unique to those resorts (besides proximity) while paying through the nose for just another hour and some snacks. That math just ain't mathing to me, lol. Especially at Epcot, where neither is especially worth it. We had 2 Epcot EEHs on that trip and did them pretty much for another ride on Cosmic Rewind. Given what a cluster kitten Epcot AH was for those first few offerings, it was money well saved.
Even at MK I still wouldn't buy AH if staying deluxe over dates with EEH. I really struggle to understand why that extra hour would be necessary, especially at that price point, when we got a truly absurd amount of rides done in the 2 hours of EEH. And that's with an AP discount on AH tickets. Full price? LOL.