That would be a great thing - to have a choice of EMH. However, I am sure from an overtime standpoint, it's probably not something Disney would consider.
I think they should go back to E-Ride nights and ditch evening EMH.
What if they made morning EMH 2 hours early? Would anyone other than me get up at 5:00 am if it meant being admitted to MK at 7:00 am and riding until 9:00 with minimal crowds? Plus it would be cooler in the summer! Just a thought.