1. Ireland is now playable, it is still a minor power though.
2. Four new unique units for Ireland: Kern (16c Pikeman), Gallowglass (Man-at-Arm), Arquebusier, Reiter.
3. Rodelero as unique Man-at Arm for Spain.
4. German civs (except Austria and Brandenburg-Prussia) can not train Man-at-Arm anymore.
5. Two new technologies: Renaissance Army and Renaissance Navy, all civs start with them. They exist in the tech tree in order...