Actually Morale does work in Frontlines as of patch 2.4, and the way morale works has also changed. It acts as an item level enhancer for your PvP gear. So, if you have iLvl70 PvP gear with 10 morale, your gear will act as though it were iLvl80.
Frontlines is still capped at iLvl80, however, and morale won't allow you to exceed that limit.
From the patch notes:
Quote:
The effects of the PvP property Morale have been adjusted.
During Frontline or Wolves’ Den matches, Morale has been changed from a property affecting damage dealt and received into one that increases the item level of PvP gear. The increased item level during PvP matches will be the sum of the initial item level and the Morale rating.
Example: If a player equips item level 70 PvP gear that grants a Morale bonus of 15, the item level of that gear will be increased to 85 during PvP battles. If, however, a player joins a Frontline match that is synced at item level 80, the same level 70 equipment would only increase by 10 levels to meet the level cap.