Here is my tentative plan for the second and third full days of our trip.
There are AM EMH at DHS on Monday, so we will probably go there first. Although I expect DHS to be very crowded that day, the extra hour gives us a chance to hit the big headliners in the first 90 minutes or so before moving on to the other things Sarah wants to do at DHS. We can stay at DHS as long as there are things we want to do and the crowds are manageable.
Monday evening may be a good time to try to see Magic, Memories, and You and Wishes. We often seem to see Wishes on the night before departure, and it might be nice to see it earlier in the trip. Part of my thinking on this is that we will probably start the day at EPCOT on Tuesday, so we will not have to get up that early on Tuesday morning. Because MK will probably be hopelessly jammed on Monday afternoon and evening there would be no reason to get there too early. So, we could spend Monday afternoon at the pool or Fantasia Gardens. We could also get something to eat around the Boardwalk area (Beaches and Cream?) or Downtown Disney. If we go to MK, we might be able to catch a few of the lesser attractions or shows that have no more than a cycle wait (Philharmagic, Monsters, Carousel of Progress, Tiki Room) before getting in position to see the castle. I don't think we would try to get a curbside spot for the MSEP because we have seen that a few times.
On Tuesday morning we can start the day at EPCOT to do the major attractions, and spend more time seeing the Flower and Garden Festival displays and maybe trying a few Kim Possible missions when World Showcase opens. We can stay at the park as long as we want before walking back to the Boardwalk.
Sarah has said something about eating at T-Rex, and Tuesday might be a good day to try that. There are no reservations available, but if we went over there around 4 PM or so, I would think we could get seated within an hour or two because they seem to accept more walkups than reservations there. If not, we can always find another place to eat, like Earl of Sandwich or Wolfgang Puck Express.
Sarah and I have also talked about taking a boat ride over to Port Orleans because we have never visited there. We could do that after dinner and get back to the Boardwalk early to rest up for an early morning on Wednesday.