If they were going to remove the multicassing restriction on paladin, wouldn't it make more sense for paladin to be their favored class? And particularly, why modify paladin, give them fighter as a favored class, and leave their original favored class? It's weird. It gives them two favored classes, which no core race has, and further, a special case for paladin, which no published race anywhere has. Even though paladin is not their favored class.
Elf wizard 3/rogue 3 becomes a dragonborn... he can now take fighter without a penalty, because it's a favored class, but not paladin... although, hey, he can multiclass freely as a paladin.