How will FATEs teach capabilities of a class? FATEs don't require players to use their class for what is intended for. There is no need to keep aggro off of others, there is no need to heal others and no need to maximise your dps. FATEs = random xp. The low level dungeons aren't very demanding either, lots of players start properly learning their class at the end game content. Most wipes seem to happen because people did not know the fight's mechanics and not what their class was supposed to do.
But as I mentioned before to make sure that players who use the suggested exp transfer method there could be additional quests to test player's knowledge and skills as the class/job he is leveling.