Doesn't matter. People paid for it, therefore it should happen to satisfy those who can't afford a switch year one and wanted a Wii U version. (With the switch version being a little bonus to come out along with the Wii U one)
The fact they backstabbed those people by not giving them any updates on the supposed "tech issue" BS before the PR release confirming the sudden cancellation showed that they didn't really give a damn about their backers in the same way a kickstarter owner should (by treating them as investors to the project rather than ordinary fans that apparently don't deserve dev info and updates)
I'll continue to be mad at the way they handled this until they admit that they didn't let the backers know about the status of the Wii U version the moment they found out and made it into a PR thing, or if they get YL out on the Switch day and date with the other systems with everything they're getting. (Physical release, Toybox, same price)
Mark my words, if they delay it until the summer/fall on Switch only because they weren't prepared to port the game to switch in such little time, IT WILL FAIL compared to the other systems unless the game is delayed for other platforms like with Rayman Legends. Nobody with multiple systems will double dip on an inferior version that lacks achievements and comes out late, not unless they really want a semi-portable experience (which I doubt will be that many switch-only owners at that point.)
The game isn't cheap after all and by the time a delayed version would come out the main focus of 3D platforming would be on Super Mario Odyssey. They don't have much time to make the best of this disaster.