Not named it the Wii U, shipped with a bigger drive, not required the clunky game pad. Yeah the thing was doomed. Still the best way to play Wii games in HD and that’s about it.
Ironically, trying to cash in the the Wii's popularity was, in my opinion, the Wii U's biggest flaw. There's the well-known problem of the clunky and confusing name. But also the fact that to ensure backwards compatibility, it used a chipset based off of the Wii's and therefore the GCN's.
It was such a risky idea to use a chipset from the nineties that was so ancient, that no one else would bother using it. The only way Nintendo could have lowered the price of the Wii U in order to increase its sales was if sales of the Wii U increased enough to lower the price to manufacture the chipset and subsequently the Wii U in the first place. No idea how no one noticed this glaringly obvious catch-22 that wound up being such a disaster that it bankrupted the manufacturer of the Wii U's chipset.
I do like the Wii U and the GamePad and wished both were more successful. Especially since Nintendo made some really enjoyable games that generation; SM3DW, Capt Toad, XCX, etc. But what a poorly planned console.