[Game mechanics]
Fix the skill system.
reduce the total amount of skill points to spend so the players has to choose where his character is skilled at.
or
remove it compleatly and give the players skills depending on the class he is.
[Quest]
In the shipwrecked quest, remove the key from sadur and put it back to the boss demon.
also let one of the minibosses drop a shield.
[misc]
if you want to help veteran players to skip tortage, sell them a lvl 20 character with the main quest done but without the quest rewards.