Yes, you can group in PvP and the group size is 6...

Ok, I finally set everything up and I have now 2 necromancers playing...plus the mystery of the /follow command is solved...

1. It is in the game and "functioning"...

2. It only works on group member

3. It only works on group members if the group was formed in the same instance. This means that if A and B are in different instances...they group up...transfer to instance X...then /follow will do nothing. Solution: abandon group, reform group, and /follow will work

4. Anytime a loading screen pops up - /follow will not work anymore (going into an Inn, death...) and you have to drop the group and reform it.

Assist - isn't really doing it for me at the moment. You cannot acquire your main's target by /assist (typing it gives you an error - only the hotkey "T" works) unless the main is engaged in battle...even then it is buggy. Right now I have to target with TAB (nearest enemy) it works...

Other observation - the auto-target option and auto-face options are quite nice for melee combat. Melee range is pretty long - characters will jump into the fight and get close automatically - this makes melee fighting actually easy.