According to the L.A. Times, not only are the Dodgers moving its A ball affiliate out of Columbus, but the Dodgers will be moving its high A affiliate out of Vero Beach.
This has an immediate effect Dodger's top pick Clayton Kershaw. His contract prevents him from playing outside of Florida for the first two years of his career. This means instead of skipping two levels and jumping to Vero Beach, Kershaw will have to make a huge jump from rookie ball to AA. If he doesn't, he'll have to sit out the first half of the season in play in a league that he's far too good for.
I don't know for certain if over promoting a player actually hurts him in the long run, but I'm sure the Dodgers would rather not see Kershaw get shelled when he's barely 19. Maybe things will work out, Kershaw will excel at AA, and become the top prospect in baseball. Sadly, that's not the likely scenario.