Xsyon? Quite a lot, according to Notorious Games' latest patch notes. The new update has overhauled many of the sandbox survival MMO's systems, including extensive skill tweaks, increased stat gains based on actions, and stat readjustment functionality.
Players may also create quests for one another. Doing so rewards both the quester and the creator with XP upon successful quest completion. Overall experience gain has been adjusted to reward players per action and via quests, which should lead to a marked reduction in the grinding necessary to gain skills.
These are just a few of the improvements, too. Have a look at the patch notes for the full list.