When I first joined as a new player a month or so back, the major thing I could see which would stop me and other new players to come was being repeatedly asked to view the scroll and return to the paper cabin after every few scenes. It would be better if you were directly taken to an "adventure" and you were made to fight NPC's on the way along with a tutorial, after which you would be ported to the park as mp2, and fight dummies and be introduced to tokens. This could be the second tutorial too, and within this tutorial the new player could chat with those at the park for help, questions, etc. After passing the tutorial, the player would advance to mp3.
That's my personal suggestion to what I would see fit to make new players stay.