Hi timbud
looks like you have a very solid plan.We went to mk on a wed and two ee mornings as well, and our fav was the wed. We noticed that there were half the number of people in the park all day long, so when you went to get a fast pass, it was usually only forty minutes away, but on the ee day, it was about 2-3 hours away..... I missed spectro too because the night we had planned to see it in March, it got cancelled.....so maybe my opinion on whether or not to see it is not the best but..... I would really not change your plans... if you plan to come back to disney in a year or two, well, then you can just make it a priority.
So dont sweat it, just go and have a great time.
rileygirl