ArtRage newbie here, so please go easy on me. But I think you misunderstand Daniel. He is not asking to remove the 'Size' control from the pressure mapping entirely. Instead he wants to control how the applied stylus pressure is translated into brush size by the software. In his illustration he wants to increase the size from 1px at the lightest pressure, to something larger than 1px.
Normally this is what a pressure curve is mapped to
Pressure:
0-----------------10
Size:
0-----------------10
But it would be good to change this to something like:
Pressure:
0-----------------10
Size:
5-----------------10
In some softwares (Like Affinity Photo) this is user controllable by means of a curve on an x/y graph.
As a newcomer to the software, I'm actually surprised (and a bit disappointed) that ArtRage does not have this in its feature set as of version 5.05. Are there plans to include this in the near future?
While on the subject of stylus properties, I also don't like the strict segregation of which tool properties can be mapped to what stylus properties. As in, why do I need a stylus with an 'Airbrush Wheel' to be able to control the 'Thinners' property on the Oil Brush? I don't want to fork out a $100 or so for a new stylus just to be able to do that. Why can't I just assign it to 'Pressure'? Or why am I not allowed to map 'Loading' or 'Aspect' to 'Pressure'? Maybe these questions are better suited for another thread another day, when I feel a bit more familiar and at ease with the software.