Just my 2 cp on the subject being "fairly" new to SoD myself. First off, I do have to tell all of you that have not played live in awhile that leveling low level toons is in no way faster here than it is on live. They have dramatically changed the exp available at low levels and adjusted content to where you can easily level naked. Level 10 on live can now be achieved in roughly 2 hours for the average user.
Now that being said I am not looking for that kind of adjustment here. I think what they have done on live is ridiculous. The low levels should be enjoyed. They are where you truly learn how to play your character, and can be a great deal of fun. The exp debt at low levels can get a little frustrating. Especially to anyone who is truly new and does not understand how to play. Reverting to a system where you make lvl 6- 10 without a debt might be a good idea. Honestly the exp rate is fine, if it were faster you wouldn't gain skills as fast as you level.
One thing that might deserve a little attention, and I think they have been working on, is a few more gearing type quests for lowbies. Low lvl quests can be a great way for newbies to stay entertained and improve their character in between groups. Overall, I love the game, and think it has been handled exceptionally well