It's bland, forgettable, has no self-aware brand identification, is not catchy, and is easily confusable. From just a purely marketable perspective it is a brand recognition nightmare.
The WiiU may have been stupid sounding, but at least you remembered it and it could stand on it's own. Successful brands get appropriated into successful words, and switch is already a fairly common word.
Nintendo should have chosen a more obscure word, or gone full fabrication.