In terms of getting cycling 'past the past', maybe this is ultimately a good thing. I know team management is more directly involved than sponsors, but my understanding is that Rabo as a sponsor should have known what was going on for years and accepted it. It might be just as well for the sport to sever ties with a company that represents a link even back to the Festina years. Although it's hard to see how losing one of the most solid sponsors could be 'good' in the short term.
Even so, their withdrawal takes aim pretty precisely on the UCI, and that pressure is the only thing I can see leading to change. Money talks.
Then again, maybe this falls into Pat McQuaid's global branding strategies, and we'll see a more empowered Pat in 3 years running a ProTour with Champion System and 3 other Asian sponsored teams, while 100-year-old races get turfed from the ProTour. Nothing would surprise me at this point.