Most multiplatform games are FPS, and if I ever wanted to play such a "hardcore" FPS, and the Wii version wouldn't be dumbed down, I would buy it for my Wii - because I can't stand dual analog controls.
Also, how can third parties complain about bad selling games if they dumb them down themselves?
I understand that developers like Capcom have every right in the world to complain about Okami selling bad, but most devs you're talking about already made dumbed down versions from the beginning. They didn't realize over time that they don't get revenue for their games, most of them didn't even try to make them good - or didn't make games for Wii at all.
This isn't due to the inferiority of the Wii compared to PS360, but only due to their laziness. Don't forget that there still are some devs who don't ignore the Wii. After all, games like Okami, Monster Hunter Tri, The Conduit, Red Steel 2 and Epic Mickey are some examples of good Wii-exclusive games that weren't made by Nintendo. These games might sell less than Crap Call of Duty, but they show that it's easily possible to make amazing games for the Wii.
Most multiplatform games are not just FPS. Yes, there are a lot of FPS games on the market due to the genre's popularity, but some of the best racing games (Need for Speed), sports games (NCAA Football), action RPG games (Mass Effect 2), open world games (Red Dead Redemption), action-adventure games (Assassin's Creed), fighting games (Super Street Fighter IV), etc are multi-platform third-party games.
Third-parties have to dumb down their games on the Wii due to the Wii's limitations. Graphics and online play are both inferior on the Wii, and third-parties have to spend a ton of money redesigning the game, making the game Wii compatible, and so on. When they decide to not publish a game on the Wii, they factor in a cost-benefit analysis. They ask themselves whether or not publishing a game on the Wii is profitable, and many third parties have come to the conclusion that it is not. Multi-billion dollar companies don't make these decisions because they're "lazy", they make them based upon very complex business models.
The fact is that a third-party like Rockstar doesn't see a point in publishing a game like Red Dead Redemption on the Wii. This is because they know that the type of people who play Red Dead Redemption want great graphics and great online competitive play, which the Wii simply doesn't offer. As a gamer, I still can't comprehend how Nintendo keeps screwing up its online play. The Wii's online capability isn't even comparable to the original Xbox Live back in 2003. Friend codes are a joke, and games like Super Smash Bros. Brawl lag far too much online. I'm optimistic for the future though because Nintendo has admitted their mistakes, and is planning on hiring other companies to manage their networking and online development. If Project Cafe can reach the level that Xbox Live is currently at, they'll win back a ton of hardcore gamers.
And yes, there are some good third-party Wii titles. But, the list you mentioned is miniscule compared to the amount of third-party games that are exclusive to the HD consoles and not available on the Wii.
I agree that Call of Duty is crap. Battlefield Bad Company 2 owns it.