In theory it is a great idea because Magic Kingdom is my favorite park and I like to spend as much time as I can there, but in actuality my family couldn't do it. There are too many things in the other parks that we would miss doing if we just went to MK for our entire stay (i.e. RnRC, EE, Spaceship Earth, TT, Soarin, for my kids ToT, B&TB show in DHS). DH and I would also miss WS, we love walking through there and taking our time and smelling the roses while the girls go off and do what they want to do, plus of course some of our favorite restaurants are there too. I can understand going to just MK due to everything that is going on at DHS, Epcot's FW being in the state that it is in, and AK going through a lot too, however, that wouldn't mean I would want to skip out on my favorite attractions/restaurants because of it.