Meh, it's been like two pages and no one's said it, lemme give this a shot.
Nothing MP says is necessarily wrong or unreasonable. Of course your tastes in 2009 aren't the same as your tastes in 1989. MP's gotten into a lot of heavier music, and would like to play in a band with a vocalist who can handle throatier and more aggressive singing styles. But as much as he likes to try pushing the band in that direction, I highly doubt he would ditch JLB to turn Dream Theater into something it isn't. And do some of you guys really think MP would try being DT's lead vocalist? Don't be silly.
As for Myung, to be honest, I don't think he's just shy or quiet. Watch the Madison Square Garden backstage video. When the whole band gets excited about Petrucci's birthday, he just sits in the back doing bass exercises. I'm not judging him as a person, he seems nice and even headed, but he's closed off from the world in a powerful way. Is it so hard to believe that he's naturally let himself get more and more closed off from the writing process? Especially when it comes to lyrics. Unless the conversation about presenting them with vocal melodies was far more contentious than we realize (which is possible) I find it hard to believe he's being explicitly or implicitly disallowed from writing lyrics.
But on the other side of the coin, it probably sucks as JLB or JM when you hear the driving force of your band say publicly that he's perfectly comfortable with you having very small roles in its creative output, and for him to imply that the reason the band works is because you play your tracks in the studio and don't get in the way of the creativity. It's a bummer as a fan to see Portnoy say that. If only because, if we want to talk about the quality of the music, JM's bass tracks on BCSL were sloppy. Something went wrong, and that something was very likely apathy toward the bass tracks. In a professional band, that shouldn't happen.
Yeah, everyone needs to play a role. While it's very possibly for the best that JLB isn't involved in the music, Elements of Persuasion proves that he knows his voice better than anyone. Why not let him use that to the band's advantage.
And as for the music; MP likes to work as the head arranger. If you listen to Suspended Animation, you can tell JP is primarily responsible for the Dream Theater sound. Rudess is definitely the number two melody and riff writer. In the midst of these personalities, maybe JM is one too many people in the mix. But I also get a powerful feeling that MP/JP/JR have developed such a tightly knit process because they enjoy it moreso than because it has to be. MP talks about how much less tension there is in the band than before, but maybe he's underrating the effectiveness of creative conflict to produce better material.
But whatever. It's not my band, and as a whole BCSL is either the best or second best album they've made with Rudess. Who am I really to judge?