We love morning EMH. It's worth getting up and going, then get out before the crowds are too heavy. We were at WDW Christmas week and did all the EMH we could and the lines made it possible to do more than just our FP+. We normally were done with MK by midday and then hoped to Epcot for the afternoon / evening.
We just returned last week from our Spring Break trip and did MK on Friday morning before hitting the road. We were able to ride Peter, BTM, Splash, HM, Mine Train (FP+), Buzz, Tomorrow Land Speedway, and a couple other rides before 10am. If we didn't have a lunch ADR at Epcot we probably would have had time to ride some of these multiple times.
Over the years, we have noticed that the crowds don't clear out as much as they once did for evening EMH. You have to stick it out to the very end to really see the crowds levels drop during busy times.