Was thinking about this more last night... So the top-tier talent you mention. These people are, like you say, the best at what they do. As such, they do have a lot of power in determining what they develop, outside of some general direction (ie it's an Assassin's Creed game).
Yes,
Infinity Ward, for example, were the drivers behind taking COD4 into modern day. Activision management wanted COD4 to continue in the WW2 setting. But, because IW was so good at what they did, and had such influence, they determined what they were actually going to make, which was Modern Warfare. And I don't see, in any way, how someone like IW could have been forced to make a Wii game unless they really wanted to.
Keeping top tier development talent happy is not easy. And if that top tier talent really wanted to work on the Wii, I think they would have been able to. It's not just a question of deploying resources when you're talking about the top tier dev talent.
As to the metacritic question, it's really tough.
I did a big writeup on launch window MC scores, but the trend held. Wii games were scored lower than PS3/X360, with a lower average, and lower incidence rate of 80+ scores.
1,193 third party physical games were released on the Wii, compared with 1,027 PS3 games and 1,180 Xbox 360 games. Sample size alone would lead one to believe that some hits would come out of 1,193 titles beyond Just Dance, Guitar Hero, Epic Mickey and the LEGO games. It just didn't work out that way. The best-selling "core" title was Star Wars: The Force Unleashed, which ranked only in the top 30 3rd party games.
If you want to say that 3rd parties proved incompetent in figuring out the Wii more traditional games market, I'd agree. And while I'll concede that the best of the best talent wise may not have been applied to Wii development, I'd argue that doing so would have been very difficult. While "doing all they could do" seems to be a sticking point definition, perhaps I'd change that to say 3rd parties made a reasonable attempt to succeed in that market. They just, for the most part, failed.