Thanks to sfidanza who found a post in the French Ubisoft forum announcing patch 1.5 for next week. Among the news features are the spectator mode for multiplayer games, the long-awaited campaign editor and a feature to watch cutscenes and battles that you have previously saved. In addition to a series of bug fixes, the patch brings the basic game in sync with version 2.1 of the Hammers of Fate expansion, including the necromancy and training changes.

Edit: The full English readme can now be found in the forums.