Nintendo's Wii U launch was met with lots of negativity. Long download times for updates, some machines bricking that didn't update properly, slow OS. Features promised at launch that never came or came too late etc. Not to mention things like no megaton launch title outside of another New Super Mario game.
As we all know now though, Wii U of today is a different story. It stands out on its own with a nifty little OS that uses little resources, a eshop with varied indies and tons of great first party exclusives that cover different genres. A quick start feature that gets you straight into your game with little issue as well. Its a overall improved system compared to the Wii U at launch.
Lets say this version of Wii U was the launch version. All the nifty little features right out off the box at launch. Do you think this would have helped the Wii U consoles overall launch window? Lets even include Mario Kart 8 at launch. Its a game that most gamers can agree is a game that can show what the system (not the gamepad, that's a different argument) can do. Do you think that would have been enough to ensure better fortunes?