Thank you all for bringing back one of my favorite MMOs! I'm already impressed with how well the server and the game itself work. 
There are a few things that I think would be helpful for players:
1) Basic summary on how things work in the game, like how classes and skills work, etc. It's been a while for me and I'm sure for any others that would come back into the fold. x.x;
2) Key that does two things at once, right after the other: Selects the object most nearby (whether a chest, NPC, or monster) and right-clicks (or double-clicks) it. Even better would be if this key also did the "Accept" function whenever a window is up. Most modern MMOs do this with the F key; it greatly quickens and simplifies character actions.
3) Slash ( / ) commands for graphics options, including fullscreen.
Thanks for the hard work! 