You might find this conversation interesting: Breakpoints Uhlan damage nerf explored
The big winners were Hussars and Greatcoat vills. Imo it was a good change.
Also I believe with the Vet Tech they kill Skirmishers and Cassadors at the same rate as before. Vet tech is probably more critical than before in age 3 but it was basically a must get anyway.
A 1% shipment curve buff might be fair, but Germany was on the strong side before the nerf. They just got less attention due to the US and Ottomans who were (and at least for the Ottomans), are, still bigger offenders imo.