I've noticed that once I reached around 20 as a paladin (and still continuing til' now at 24) that arcanist simplayers seem to simply ignore restoring my mana - even if i'm empty and the group is full. (max mana is 600 atm, but this still happens if I equip some higher level gear and get up to around 1.2k mana)
#Simplayer mana restore
simple hatch
crisp mountain
Possibly a similar problem, when out of combat, druids should probably heal the group to full hp, instead of just letting everyone run about at 50%