In the pre-vet campaign a main source for Grand soul gems is from Rewards for the Worthy bags. I understand with the coming update these will become just gold rewards (thank you ZOS) but it will leave pre-vet AvA players with a handicap to get filled Grand Soul gems.
As far as I can tell the skill line is not filling soul gems for player kills in pre-vet AvA . I have the soul lock passive and after 100 player kills I have yet to fill an empty grand soul gem. I don't spend enough time PvE in Cyrodiil to see if it working on NPCs.
A level 25 cannot fill a grand soul gem in regular world PvE.
Does the player scaling for Cyrodiil interact correctly with Soul Magic?
Appreciate comment from anyone who has experience with this before I bug report something that's not a bug.