The thing on the Slightly Mad case is simple.
If they just admit smth like:
'we've made some new estimations and we see that WiiU port of our game will not be successful financially. So we've made a hard desision to cancel it. We sorry for all the inconviniences and hope to to deliver more excellent games in the future to our fans.'
Then it will be no questions to them.
But all the bullshit about 'even our tires physics is impossible on WiiU CPU' after 3 years of bragging on bringing 'the best racing experience to the Nintendo platform' just looks silly.