My understanding is that they are following established procedure. If Snyder were to not give it a go, Zilmer wins by forfeit. Zilmer earned that spot, just as Snyder earned his own spot. If they were to change the established procedure at this point, they would be opening themselves up to litigation and hard feelings from Z. They can change it for next quad (maybe even next year), but my guess is they are stuck with this system for the time being.
(I made it through the whole post without saying "withdraws" or "pulls out.")