This is getting sad, Kaedon, really.
First of all, kayfabe, that does nothing destroy the credibility of the draf. You may not like it, but kayfabe wise, as long as they explain it by saying the match was booked before hand, then it's all good. Besides, how would haing it on Raw help? Then Ziggler (SD guy) would have to "ruin the credibility" as well, by going to Raw. The only difference is, on Raw, it'd be more inconvinent for everyone involved AND it would draw more attention to what you call the "ruining of the credibility" with more people watching.