Well, in FR/LG Milotic, Umbreon, Espeon, Dustox, and Beautifly (I'm postive about the first three, not totally sure about the two bugs) could not be obtained through evolving their lower forms. You had to trade them to RSE to do it. This was because FR/LG had no clock, not even an internal one like RSE, so Eevee and Wurmple had no way of knowing who to evolve into. And the lack of Pokeblock or visible Contest Stats made it impossible to max Feebas' beauty.
It won't be a problem for Umbreon, Espeon, Dustox, or Beautifly now since they have a clock, but for the Area Evos who knows. They might make you have to trade to DPt to evolve them, or they might make new areas with simmilar properties.