The normally much maligned Air Canada Aeroplan program has got it right with its top tier (100K flown miles qualifies for 'Super Elite')
* NO CAPACITY CONTROLS if Super Elites redeem awards on AC metal
* No premium (ie-double miles redemption ) for Super Elites' no capacity controlled seats
* Lack of transferability of Super Elite SWUSs; the SE member must be travelling on a SWU in order for a companion to use one as well. While I normally view transferability as a good thing, Aeroplan understands the concept of 'breakage'- the fewer people that have the chance to redeem an award, the MORE availability of that award.
Now, if you are a mid-tier member of Aeroplan, their program absolutely reeks. And their earning ability for intra-Canada flights should drive all but its mega frequent fiers into the arms of waiting US programs!