But if the criticism is basically "why is it structured like a musical?", isn't it fair to answer, "well, because it IS conceived as a musical and written as such."
I think maybe this specific criticism is not so much about musicals, but rather that TA is often neither here nor there in terms of style. Sometimes it's a musical, sometimes a regular DT album (e.g. for TGOM and MOB). Sometimes it's a classical performance with overtures and entr'actes, sometimes it feels like a soundtrack.
I guess my unpopular opinion, with regard to those with unpopular opinions (Inception!!!), is that this kind of feedback makes it seem like DT, or any band for that matter, won't ever be able to win.
There have been a number of fans, and correct me if I'm wrong but I believe you may have been one of them, who have commented in the past that DT were getting a little stagnant with the music they were writing and how their albums were structured (a few medium length songs, a few ballads, and a long song at the end). Now they come out with an album that's all over the place... and there's a new problem: It doesn't have
enough structure.
Obviously there are shades of grey between the two extremes, and everyone is going to have their own view on that, but there is a point where I wouldn't fault DT for asking, "What are we supposed to do?" Like, is it really that big a deal that the album is a kind of hybrid between classical performance, conventional DT album, rock opera, and soundtrack? If anything, I personally view that as a positive because it's a very unique approach.