I heard some troubling things at the last shows I was at. I went to Pelham, Atlanta, SC, and St. Augustine. At almost all of the shows there were various mentions of taking a break (which I expect) but then they said things like they were going to do their own things musically and perhaps the most disturbing was "this is the last time you will hear these songs". However, at St. Augustine they kept saying things like they will be back and will be touring again in Florida, etc. Very optimistic, not breaking up type talk.
I think they may just genuinely be tired. I have heard more than once for more than one source that they never expected to be this big. I agree that they miss the smaller crowds and venues. I think that is why they randomly play at a lot of dive bars after the shows. I also think they enjoy meeting fans and I think that has been taken away from them a bit. I was lucky enough to meet Marcus and Winston on this go around and they were so grateful and still very humble, the anti-rock stars, if you will. They were shocked that I waited for them for like 5 hours. Which I thought was odd. But they were awesome and went out of their way to get around the blockades that "protect them" from the fans.
I don't think they expected to be this big and while they definitely enjoy it (they were loving the largest crowd I was at in St. Augustine) I think they miss being able to play those little venues. They seem like a more intimate band sometimes and it has been taken out of their hands. They HAVE to play these large venues with ticket lotteries or face a backlash from fans.
I think they definitely deserve a break from touring for a bit and even to do their own things musically for a while, if they want. I just hope they come back. Music is their passion though, more so than anything else it seems. And when you have that bug, you can't stay away for long.