If you don't like the genre nothing will convince you, but it is worth playing. It does what all the fanboys claim Skyrim does so well. It blows that game out of the fucking water. The Wii U offers experiences you can't get on other systems. Pikmin 3 and Wonderful 101 are crazy fun if you aren't turned off by cutesy shit. I would not buy a Switch right now, but getting a refurbished Wii U is a good idea if you like to play older consoles. I know I'm looking to buy another Dreamcast.
From a quick check in, the wii U is almost the same price as the Switch, which taking into consideration that not much more games are going to be released, doesn't seem like a good deal. Xenoblade Chronicles X looks juicy though.
Besides, isn't wii u emulation getting somewhere?