I just think a third go at something that already failed twice on that station isn't quite sound.
Popular taste is a moving target. Just because something was overplayed before doesn't mean people don't like those songs, or won't listen to them again after an absence. We see that all the time with various revivals in popular culture.
In this case, the station would like to retain the brand of alternative, whatever that is, by playing music that will hopefully attract the largest possible audience at this time.