Honestly, the overworld just doesn't do it for me. The game feels a little uncohesive...disjointed. The overworld does nothing to tie the game together.
This is pretty much how I feel about the overworld. I like that they tried something new but in terms of progression its basically what they've been doing with the nsmb series. If we ever get a sequel to this game (which I hope we do in the distant future) I hope they do something ambitious like the smw world map.