Started to comment and created a massive WOT. Made it more concise, though still long - apologies. My posts are not necessarily views shared among other HB members.
I don't mind a long tourney though I can see the benefits of keeping them shorter and hosting more. I like the idea of seasonal tourneys, spring, summer, etc. Keeps things fresh and fits in well with the UNAC Ruleset (which has been a success, imo. Still room for further polish though).
I would support a Double-RR as it will shortens the tourney but you will still get 16-0's though they won't seem as prevalent as strong teams won't face every weak team.
A tiered double RR I like better as it would give surer indication of where teams stand against one another. I like the idea of seeding and using this tourney as the benchmark or source for the seeds. I like the idea of ladders, but don't think they would work for us outright. I would support something like what Cleric has posted about having chances for transition between tiers. You still shorten the tourney and I think it would give the best shot of improving the competitive atmosphere.
I think the point should be keeping tournaments fresh for the competitors, keeping the matches as competitive as possible, giving reason to compete for any team and offering opportunity for movement in the pecking order.
For a tiered double RR, for playoffs I'd like to see a best of 3 in the finals (sudden death up to that point, including for 3rd). I feel the top two teams have earned a chance to comeback after an initial loss, not to mention there hasn't been a series in NA that I'm aware of.
On transitioning between tiers, perhaps have a mini RR between the big tourneys for Div 1 teams 5 and 6 vs Div 2 teams 1 and 2 to decide who ends up in which bracket (assuming 6-team brackets). OR could do a single elim with top and bottom 3 instead, with both Div 1's 4th and Div 2's 1st having byes. Something like this should be able to happen as soon as the Div 1 playoffs start and finish well before the next full tourney begins. EDIT: I guess this is basically what that ups and downs thing is. I guess I support it.
Also, that cross-tier week would be nice. I'd stick that between the RR and Div 1 playoffs and include either a public decision on who will fight (I'd see like 2 matches working out) or the Div 2 1st and 2nd picking their opponents from the top tier.