Other than 2014 Worlds I've only played one tournament that had a MS1 division fill. And I haven't seen a Legends division even offered within (roughly) 1000 miles of where I live, and never below an A-Tier. It's worse for older women -- except that once a year the
Women's Global Event offers FG1 & FS1 (and Junior divisions).
MS3/MS4/FS3/FS4 and Junior divisions are all rarely offered in the Pacific NW.
So the real issue is how players in rarely (or never) offered divisions get sufficient points to qualify for an Am Worlds invite. Consider that playing outside your division most likely means finishing in the nether regions, garnering very few points per tournament.
So I think points in other gender or age-protected divisions should be (at least) doubled when the player's gender/age protected division isn't offered.