My expectation with the watercolor brush was, if I touch the brush to the paper, the color "leeches" out... spreads into the paper as long as I hold the brush there, or as long as there is a differential fluidity between the brush tip and the paper.

In ArtRage (and using a mouse with the watercolor tool), I expected to be able to hold the mouse button down over the canvas, and color would bleed into the canvas at the cursor location.

The way the watercolor tool behaves now, the color only appears on the canvas when I release the mouse button!

Please consider implementing a mode where, for a stationary mouse cursor, the watercolor bleeding occurs proportionally to how long the mouse (or pen) button is held down.

No mouse movement necessary.