It wouldn't kill them to chill on the new music front for a bit, especially after how The Astonishing cost them a lot of good will (whether proponents of the album admit it or not)
They should go out on a tour playing all of the stuff that they're had to set to the side for a while b/c of new music, length, whatever.
Octavarium (with new animation), ACoS, LOTS of stuff off of When Dream and Day Unite, even Falling into Infinity... it's time for them to celebrate their catalog at large and give new fans a chance to experience live stuff that just doesn't get put into rotation anymore.
Hell, BCaSL barely got represented at large for a large cross section of us (US at least) b/c they didn't do many headlining tours for it that I recall, opening for Maiden or Yes. The Count of Tuscany? Please, and thank you!!!
Finish this tour, take some chill time, and then maybe at the end of 2017 go out and rock the unsung classics, as it were.