Yeah...I'd be down with Mabar coming up again for 1 week somewhere around April, with at least a 1 month buffer in either direction between events (ie, no moving from Crystal Cove or Risia right into Mabar or vice versa).
CC comes up more often, I think, because it isn't holiday themed and offers attractive gear to a much wider audience. That said, access to the Epic Robe of Shadow and Wraps of Endless Light is something I feel should be a little more regular than once a year for new Pale Masters, and monks, respectively. That the Shroud of the Abbot has gotten a nice upgrade, and is lower ML, and that we're finally starting to get some new, interesting and powerful handwraps makes this slightly less important, but not irrelevant.