I don't think it's fair to classify intelligent design with astrology. That's as illogical as classifying a Model T Ford with a 2009 Cadilac.
Well, Astrology DOES have a lot more going for it than ID does.
After all, it can tell a LOT about HOW it has to occur: not effective before birth; directional from certain solar system bodies; influences from different bodies being qualitatively distinct from one another; such influences combinatorial in that influences from different celestial bodies amplify, modify, nullify one another depending on positions relative to each other and relative to the background star field; and more.
Maybe someday the Model T Ford of ID will catch up and figure out how/when/where design is supposed to have been applied.