Based on the comments from Stardock including Frogboy, Island Dog etc. and the streams I guess the change log will include
- Better crafting UI
- Revised Sovereigns skill tree , which works e.g. provide the promised features (heroes, more enhancements)
- Revised Heroes skill tree
- Additional heroes
- More terrain features
- Hopefully also revised spells description and cost
- Hopefully also revised skills description and cost
- Other nice things
