It would be such a mistake for them to copy DL's SM and put it in WDW's MK. The whole point of the ride is the herky-jerky motion. It's the same with the Matterhorn - the world's first steel coaster. What if they redid that track to make it smooth, pleasant and free-flowing? That defeats the whole purpose! I've been on every SM in the world and WDW's is the best. It's old school. It's painful. It's what a coaster should be. The one in DL is nice but if they were going to do that in WDW why wouldn't they take it to the next level and give it loops, cobra's heads, Immelmans, etc? Why just do a smooth ride?
And while we're on the subject, how about leaving SM alone and removing the Tomorrowland Indy Speedway? That is such a 1970s afterthought, like they didn't have the money or creativity at the time to do better. Get rid of it, incorporate more flora and landscaping, and then build a large structure that could house a TS restaurant (non-character) and an attraction based upon the light cycles of Tron to coincide with the sequel coming out in two years. You could even build the TTA into the ride and have it looking down on the game grid. Yes, I've thought about this way too much, but it's a better idea than WDI teaching an old dog bad tricks. Sit, Ubu, sit. Good dog.