Marc, while I agree that the Neal/Portnoy projects can kind of blur together at times (and I enjoy them all a ton, to varying degrees), I don't think that is the issue here. Same goes for Casey singing more, as I am a big fan of his voice, or LaRue's playing, which does seem great. I don't care how good the playing is, if the songs aren't there, then it doesn't matter a whole lot, IMO.
Even a song like Love Letter, which I like a lot, feels way too long. It seems like this album's Love Is What I'm Waiting For, but they they made it too long. Sure, it's only a little over 5 minutes, but I think it would have packed a greater punch at a length similar to its younger cousin (which was right at 3 1/2 minutes). Minor quibbling, sure, but as much as I like the song, it feels like it overstays its welcome.
With the 2nd and 3rd albums now being heavier on the prog than the 1st, I think it's clear that the mentality that made the debut special (where it was all about catchy songs with a touch of prog sprinkled in here and there) is one they do not have much interest in trying to recapture. There is not a single song on the new album under five minutes. Quite a contrast to the debut, where seven of the 11 songs were under five minutes.