Most people, when they are describing what they think the Gamecube should have been, they essentially are saying in paragraph form "I want it to be a more powerful Playstation 2."
I don't think simply making the console more of an expensive Playstation clone aimed at adults would solve Nintendo's problem. They would have still been sacrificing their market of Nintendo fans, just in a different way. This different way would have ended up with even lower home console sales.
What Nintendo should have done was make the console more like a true Nintendo system, one which advanced upon the interface in a significant way, one which catered toward the family living room. One which was centered around fun software that drew the family to the living room. NES, SNES, N64 and Wii all did this. The main reason for N64 failure was expensive games on expensive cartridges. It also wouldn't have hurt if the controllers didn't break so easily.
I describe myself as a little dose of toxic masculinity.
