I can say why.
To test whether a character is viable, we now need to level it up, like in post-release game. As testers, we have to go through all the fire and water the release players will go through. So, if there is no such option post-release, it should not be in before. And if there IS such an option psot-release, FOnline suddenly becomes another MMO project. You want rerolls? go play Allods, they ahve better graphic too.
I would want this game to be hard in a special way. Not the "Kill 3234589 mobs to reach next level" way.