I've played a couple of stages there to unlock a character and that's it. It's the same witht he Wind Waker Map. You can remove the restrictions there too. I see no reason not to remove a restriction before you play the stage. Makes the stages easier and more fun. We have the Second Quest...
Yeah same thing on Switch. It's great. Don't need to play as him, as long as he is on the map. Did you know this also works for some A-Rank heart pieces and chest loot too. Yet another reason why the 3DS / Switch version is so much better than the WiiU version.
The only hard one on the WiiU port for me was the final Ganondorf stage. The one where you have to kill beast Ganon with all the loot you've gathered. Darunia is just so terrible. I had to over level him just to get it. As I said above.
I've not tried any of the Legends / Switch exclusive...
So level FF right? (do you get the joke)
Seriously though back in the day on WiiU, I did them all around level 75-100 with the levelk 3 weapons but DE is balanced totally differently. I think 75-100 with good level 2 weapons should get the job done. Though the last stage in the Gannondorf...