They played more new songs in their shows last year since the beginning of the tour. Four new songs is pretty common for most bands who are out promoting their latest release.
The Rolling Stones are doing three from their latest album. Depeche Mode did four when I saw them on their latest tour.
I get it. You want quantity. As long as they release albums, but the tours are about the old hits, it's ok. They're not a legacy touring act.
The reality is that any band with a longer career is touring thanks to their old hits. Most ticket buyers go see the Foo Fighters because of their hits, same with Metallica and Depeche Mode. Etc etc. Some GN'R fans use this as a label. On the other hand, not many bands have that kind of a timeless catalogue. Most bands touring would love to be in that position.
/jarmo