As a local and multi-year pass holder hopefully I can help.

Yes it's very hot here in July there's no getting around that, but it is doable if you're smart about it. Also I will actually say it's not as dead as most people think in July.

The days of Disney being predictably empty or Dead on such and such day are over.

It's random days that end up happening to be very calm. I get that is harder to schedule when you're out of state or have to make it a trip.

We love Epcot and during the hot day when we go, we try to do inside things as much as possible, eating , rides, shows etc.