If I'm a promoter, I'm looking at sales for the first leg of the tour and offering club gigs, which of course they won't accept. Realistically, there are some perfectly nice 1000 seat venues down here which they'd sell well, but they would never do that. And BlueHaze is right. Part of their problem is with the format this tour. Particularly up in the NE. The show, while quite good, was a cookie-cutter gig. Once you've seen it you've seen it. It has very little replay value, even for their fans.
Another consideration when discussing their touring is that they have a pretty fixed audience. They're not exactly attracting legions of new fans. If they sold 1200 seats playing a mixed set one tour, you can bet they're going to sell something pretty close to that on the next tour. It's not like a promoter is going to roll the dice thinking "this time they'll surely sell 2k!" What you can expect is that this tour will sell slightly under the last, since many who don't like the new album will sit this one out. Hell, just adding a proper encore would help their sales.