Agreed on the first two points, and I'm afraid the video game point would be better suited for another debate. Here's where I'm in disaccord though; Muse not only sold the rights of one song to a franchise, they also sold the rights of an exclusive one-off version of another track, and worst of all, recorded a proprietary song for the series. I'm not saying their motives were fiscal, but it comes down to one word... FAME.
There's nothing wrong with them wanting it. Hell, they've worked their asses off for over ten years doing what they love and do best. They've reached a point where until now all of their good publicity were based on word of mouth, insanely good live performances, and pure talent. You could argue though that Matt is starting to develop a 'bigger than Jesus' complex. He said in the September 2009 Spin magazine article, and I quote, "We'd like to be remembered as one of the biggest bands in history." Again, nothing too wrong with that. It's the cheap parlor tricks that they're using to obtain it.
Now, I'll digress for a moment and admit that I still love the band and almost everything about them. I still see them multiple times every tour (and jump and sing along to all of the songs), will recommend them to anyone showing even mild interest, and own more shirts of theirs than any sane human being should. What they're doing to themselves though is cheapening their image to obtain fame and popularity faster, and because of this discrediting themselves artistically. Before, I would NEVER hear anyone say anything negative about the band. The truth is, they're quickly becoming more and more kitschy to those in the music and art worlds, and are becoming more appealing to 14 year old girls than to others. Like you said, Muse is growing up... As much as I'd love for the wild guitar smashing Muse to return, I know that's not going to happen. I would just like to see a Muse again who doesn't give as much of a fuck. Back in the OOS days, Nestle tried to obtain the rights of Feeling Good for a commercial. The band refused, but they used it anyway. You know what Muse did? They sued Nestle, and walked away with a settlement which was donated to Oxfarm. Nowadays they would probably approach Nestle to use the song.
Long rant short, I don't EVER want to see a Muse poster in Wal Mart like you can with Greenday
And as a random aside, I noticed that we were at the same show in Boston this year. Crowd surf laugh FTW!