- Make all units scale based on colonial statistics (and buff for those who need them).
- Exchange the Royal Guard upgrade to another unit and give Cuirassier the standard 30%.
Reduce the Thoroughbreds card to a lower percentage (perhaps 10%) and also affect the hussars.
These are some alternatives to balance the statistics of Cuirassier in the late game, without prejudice to age 3 which is where they are ok.
only unit going up 40% is just too ugly design.