Since people will have to pay extra for hopping with the new passes, yes, I do think evening EMH will increase the crowds that day, although probably not first thing in the morning. I figure that the crowds will get heavy about the time they currently do - 11 am or so. So I think MK will become red on Wednesday. MGM will probably drop to yellow, although I don't know why it is so busy on Wednesday, so it may not. I hadn't seen this table and we went to MGM on Wednesday on our trip last March, and it was our only really busy day. (I had assumed because it had it's EMH the previous day it would be less crowded - wrong! And it was our last day, so hopping wasn't really an option unless we wanted to give up on MGM altogether.) Epcot will drop to yellow or green.
Best Park on Wednesday: I'm guessing AK since it had it's evening EMH the day before.