I imagine that, as far as "common systems" go, Arboreus will have all of it.
That said, PK, theft, pillaging will all be possible on Arboreus , but to do it you have to be evil-aligned, and being evil in Arboreus means a lot of trouble (you probably won't live for more than 1h in there, and what is it good to steal stuff and die before going home)
So much so that the devs even created the eclipses, they will be a time recurring event (say, every 2 weeks, for 4 hours) in which Arboreus roughly becomes another Syndesia.
In my opinion, the limitation of "full PVE" in Arboreus will happen because of the way the planet works, not because they enforced any special mechanics that will not work in that planet.
And if you are a full PvE, social type of player, there will be a lot of cities too far from the portals between worlds, in which you can live your life peacefully without ever encountering other races