I just purchased AR6 (Windows, desktop) and upon entering the Brush Designer it does not operate at all well. The brush strokes are very small even at max size. I went back to AR5 and all was as expected. I tried to create exact same state in AR6 before opening Brush Designer and still it does not work properly.

I am in the early stages of documenting this before I write to Ambient Design support directly, but I was wondering if anyone else has the same issue. Preferably you have AR5 and 6 so that you can open and try Brush Designer in both.