Actually it does, unless you completely suck as a roleplayer. Revan as the saviour of the galaxy (LS) or Revan as the bouncing yo-yo who cant make up his mind.
Revan now has a history that has nothing at all to do with any player, they now have their memories back , which means you no longer have the blank slate effect that using the amnesia shtick gives you.
It's no longer a case of being tricked into playing the character but rather the designers saying this is the character you will be playing. If your going to go the route of forcing people to play pregen characters with completely defined histories, you may as well go the whole way and do it JRPG style which give significantly better stories as they dont have to deal with various outcomes.
Onto point two.
You cant just knock someones level back without a reason. Starting something at high level ,especially when the game is not on the same system (seems very likely) is even more likely to alienate new people.