The blacksmith is now a key strategic building going forward. Upgraded troops are much stronger than non-upgraded ones. They key here is to balance your resources between strategic upgrades and actually building units. Too few units and you will be overrun. One upgraded warrior still wont' beat two non-upgraded warriors but two upgraded warriors might beat three =).
Upgrades
Attack
This comes in three levels: I II and III. Each upgrade grants all of your units additional damage.
Defense
This comes in three levels: I II and III. Each upgrade grants all of your units additional armor.
Regeneration
This comes in three levels: I II and III. Each upgrade grants all of your units health at the beginning of your turn.
Resilience
This comes in three levels: I II and III. Each upgrade grants all of your units additional max HP.
Leather boots
This upgrade gives your knights one extra movement point per turn.
Advanced Fletching
Increases the range of your archers by one.
Advanced Awareness
Grants your units an additional range of vision. While the default distance a unit can see through the fog of war is one, with this upgrade they will be able to see two tiles.
Some minor beautification updates
UI
Started work towards a non-ugly UI. Added some HP bars where there used to be just numbers. Added various gradients to icons and backgrounds so things stopped looking so flat and plain.
Models
Added a builder model and animations to the builder unit. He can now idle, run, take damage, be killed and build a building. What a guy!