I think one of the difficulties of being a classical composer today is that you are still competing with the likes of Beethoven, Brahms, Mahler, etc. The audience for classical music today, apart from being rather minuscule, is also mostly older people who are (I'm guessing) generally less adventurous than your average up and coming young composer.
As far as the concerto is concerned, it sounds pretty cool, very exciting, but I wouldn't want to judge it on a single hearing. Definitely seems like the kind of music that would repay multiple listenings.