Calligraphy tool dots always have a stroke and are much too small with default preferences

Steps to reproduce:

• delete or rename preferences file
• open Inkscape
• switch to calligraphy tool
• click on canvas to create dots
• Shift+click on canvas to create dots
• click and drag to draw a line

What happened?

• the dots are so small, I cannot see them. When I change the stroke width for the calligraphy tool (the style property, not the width in the tool controls bar), the dots change in size - so it seems their size depends on the current stroke width.
• each dot has a stroke, even if the calligraphy drawing does not have one. The stroke is always black.

What should have happened?

• the dot size should depend on the width set in the calligraphy tool's tool controls. Bonus points for making it depend on pen pressure.
• dots should not have a stroke if the calligraphy tool drawings do not have one.

This is a new feature in 1.0. It would really be great if it actually worked, so we can feel better about announcing it to our users.

Inkscape Version and Operating System:

• Inkscape Version: 1.0rc1 (b38b5cc7f9, 2020-04-10)
• Operating System: Linux Mint 19.3

/CC @marcjeanmougin