Although the tutorial teaches you how to move, attack, use skills and use potions: there's still some fundamentals that new players need to learn right off the bat:

The most important thing I can think about is the stat distribution. I saw numerous new players (some as high as level 10!) With unspent stat points. I think during the tutorial after the new player levels up there should be a pop-up screen that you touch that takes you to the avatar screen and tells you to disribute your stats. That's the only thing I can think of.
Any constructive feedback is welcome.