I would like a stability update to the Wii U that gives us the ability to make our own themes, I was thinking wallpapers on the home menu instead of the boring white background.
As well as something to speed it up, getting the home menu to pop up in smash bros is as a bad as it is on the old 3DS... and actually physically existing games/apps takes too long as well :/
For 3DS I want a UI that doesn't look like it's from 2007 or something lol.
And games? Probably more smash stages and more characters, a completely customizable tournament mode like you can do in mario kart that lets you use amiibos and your own custom fighters.
And I can't think fo anything else since Hyrule warriors and Mario kart 8 already have tons of DLC...