Still love the band, but they definitely lost popularity and momentum.
They went from
Playing 3k+ capacity venues in the US back to house of blues shows.
I think most of these shows are sold out or close to it though. I think they are just attempting to get back to their roots and regain some of the fans they may have lost over the years. I'm sure they could have played the larger venues if they wanted to. Paramore, when they released brand new eyes, had already been playing bigger venues (like All Time Low) and went back to HOB for one tour just because they felt like playing slightly more intimate shows.