I recently checked and understood that it was my fault. I misunderstood how this setting works. Thought that I could type value for each brush in that menu , but realized that I should do it in brush editor for every separate bursh
I’m sorry for spending your time, and thanks for help and really nice app.
Hope that sometime Artstudio would have setting to change ui accent color ,that’s would be very nice

Bug with smoothing
Bush vs global on same level
In v3.0 all is fine