If the system was in the range of 7750 AMD GPU tweaked for gaming with 4GB DDR3 RAM and was easy to port PC projects from, I think it would've gotten a lot of support with a full one year head start I think. Devs want to move on from PS3/360 but they don't have a viable option.
I think if Wii U would've gotten things like BioShock Infinite and would be confirmed for Final Fantasy XV and Kingdom Hearts 3 among others if it had a better chip. I think at a minimum too it would've had the best console versions of things like Black Ops 2 and Assassin's Creed 3 because they'd be able to run at 1080p resolution at least.
Developers don't hate Nintendo, but they just don't want to have to do something radically different for any one of the main three companies. Another PS3/360 type system with a low userbase doesn't interest them.
If Nintendo had a more powerful system and was more aggressive in their software approach to it and got more third parties on board, I think they could've cleared 8-10 million in the first year as a headstart and made it very difficult for Sony/MS to catch up.
