I don't think The Astonishing was ever going to be the future direction of the band, regardless of the reaction to it, which was always going to be divided, that didn't surprise anyone. TA was a one-off "project" for me, something JP wanted to do and got JR involved, not really a band project. In fact I almost don't consider it to be a standard DT album, more of a musical theatre piece.
No surprise that they will go back to their tried and trusted path on the next album but, as I say, I don't think it is a reaction to the fan response to TA, much of which is actually very positive by the way, just what they always intended.