With a relatively low user count, rotating exp caves and an exp boost anyway - i dont think this server really needs an exp cave, there is SO much un-used content now, especially as the high levels just do bosses. Maybe a a further boost to those under 70 to catch them up to the main levels to add to some competition, nobody bar a few are around 90 anyway. Surely nobody would complain with that as more players makes the server more fun.
If only chrons could be reinvigorated with a team like TPR, server could flourish again.
Edit: The only thing you might want to consider tweaking
@MiloFoxburr is the caves within the rotation, as some are dire and pointless being in there at all.