How will redefining the planets affect astrology?

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This week a new proposal to define what constitues a planet has been getting lots of press coverage. Ceres and Charon look ready to be upgraded to planets, along with catchily named UB313! I'm not aware that Ceres and Charon (or Ewe-Bee) are used in creating horoscopes, unlike Pluto. I doubt astrologers are going to pay any attention to what scientists say about how you "define" a planet, but it does seem strange to exclude these two great rocks if Pluto is deemed to affect our daily lives. Ceres is quite large and far closer to us than Pluto. Charon is comparable to Pluto in size and position. Just because these objects were discovered only relatively recently (Ceres in 1801 and Charon in 1978) should they be excluded from Astrological considerations? If so, why? What special place does Pluto hold in the heavens?