The overhang is tacky, wish they removed it.So for me I think the one area that Test Track lacks is the aesthetics...World of Motion is a beautiful building.
I'm not sure why the tarp in front remains even with the second redo of Test Track, but it is what it is.
My main push for a World of Motion redo would be that they can get thrill rides from anywhere, preferably in World Showcase. I might have kept it until the early-mid 2000s when trackless technology came about, and World of Motion could have been an amazing trackless dark ride.