Literally all I've got left where PvE Grimoire is concerned is sidearm kills and VIP patrol missions.
For about two hours I was going in and out of Cosmodrome finding all those beacons with the little star on them. I'm beta/day one player and popping in on all them old areas was brilliant.
Helping people out with the Taken that spawn. Public Events; Devil Walker, Extraction Crews etc... Even killing the "Servant" Acolytes and triggering a Dark Below mini event. Taking that route through The Grottos cave and emerging at Forgotten Shore, sidearming everything along the way!
The nostalgia was real...
Update edit... VIP kills and sidearms done! Loved reading the replies you lot left. Lots of love for good ol' patrolling :)