It takes a while to get used to painting with a Wacom tablet, but Viewport Canvas does offer some enhancements, making use of the grip-pen pressure. Expand the Tablet Pressure options in the Viewport Canvas UI and you'll notice that pressure can be selectively toggled between controlling any or all of Brush Radius (size of the stroke), Opacity (heaviness of the stroke), Hardness (which controls the brush edge falloff), and Scatter (which creates noise in the Brush Image distribution). These functions have analogs to Wacom tablet used in Photoshop and most other painting programs.
In the following screenshot, the brush stroke examples are as follows:
A: Default moused stroke
B: Wacom pressure, using Radius only
C: Wacom pressure, using Radius and Hardness
D: Wacom pressure, using Opacity only
E: Wacom pressure, using Opacity and Scatter
F: Wacom pressure, using Scatter only and with a Random Scatter (22-33) range
The Randomize section allows us to set arbitrary ranges...