I think sunset them but give them new weapons at least to make the activities relevant again. The menagerie is the only thing that has remained relevant until this season when people started farming forges during the GG or even before then for the auto rifle, but that's only due to the meta. Sure the weapons we get in the future will be reskins but if they can at the very least make the activities relevant again, we might have more to do between major expansions when the seasonal content inevitably slows down after week 2. Not to mention this way maybe new light players will have other players who know what they're doing to play with and help them complete these activities, etc. As it is, new light players will eventually get access to these activities but by the time they do, there will be no reason for even these players to try playing anything.