First of all. The best fucking patch ever, thanks.
Now my suggestions (1.º balance and 2.º aesthetic):
1.º Change doppeldsoldner price. from 75/125 to 100/100 or 120/80
Even with this change, it would remain as a marginal unit. But it could at least be little more usefull.
2.º Change (pure aesthetic). Uhlan appareance just for its TIER1
The tier 1 Uhlan should seem more archaic, with late medieval appearance in Tier 1. In Age II, all the German units look archaic, but the Uhlan feels out of place compared to them.