Draenei: Paladins and Shamans?

When the Draenei race was initially announced, a Blizzard poster said that, tentatively, Draenei could be warriors, priests, mages, hunters, and paladins. With the more recent announcement that Draenei would be able to become shamans, many (myself included) wondered if they would still be able to be paladins. However, Tseric recently confirmed that Draenei will still be able to play paladins - which seems fair, as it would leave the Alliance with three paladin races and the Horde with three shaman races. Lore-wise it seems somewhat murky territory - weren't the Draenei supposedly a shamanistic society before their integration into the Burning Crusade, when it was revealed that they were introduced to the Light? I was never much of a loremaster myself, so the changes that seem to be getting made to the history of Azeroth continue to baffle me...