I'm playing the Wii U version right now and I'm not really having any problems with it that aren't on the Switch version too. The game still looks really nice because the art style is really well done. I can see the game working well on handhelds because it is easy to save and autosaves somewhat often. Its also really easy to just hop right into the game, even on the Wii U. I see that both versions get some performance issues, but they seem a lot more severe on the Wii U. I'm not really too annoyed by the framerate, but it is an issue and if you can't stand low framerates then I would suggest you get this game for the Switch or avoid it entirely. Also, the developers have stated multiple times that they want the Wii U and Switch versions to be the same experience, which is why they removed map and sheikah slate gamepad features from the game. If you can't wait, then go for it, but you will get a slightly worse framerate, 720p rather than 900p, and no portable mode. If you aren't interested in those things, I would get it for the Wii U, but if those things interest you for this game, wait.