[Grim Tuesday]

I think it's an absolute necessity for early season regional finalists to get something out of wild cards. Maybe if a wild card goes unused in a later regional, it goes to whomever would have gotten it at an earlier event, had that team been generating wild cards already.

As towards passing cards down into the semifinals, I don't really know how it could happen. Would you give it to the highest seeding semifinal alliance captain that didn't win? The one who was beaten by the eventual regional champion? Both those methods could work but it ends up being almost luck of the draw (though, waitlist is almost definition of that already).