I'm not following what you are trying to say. Help me here.
You still have to be Diamond or Emerald club to buy "behind the benches", right? Now, instead of last year's option to buy 6 seats at full price, 6 seats at reduced price now it's option to buy 12 seats at full price?
If that's the case, if the person doesn't want all 12 behind the benches, can't UND sell another Diamond or Emerald membership and sell the unclaimed (by the first member's) seats behind the benches?
Before:
Diamond Member A: six full, six reduced.
Now:
Diamond Member A: say only goes for 8 full (not all 12 as last year, because of no reduction).
Diamond Member B (new member!): buys 4(?) at full.
I guess I see a new Diamond Club member in FSC in that deal.
What am I not seeing in that scenario (if it's right)?