They look good, but my feedback is... why? There are hundred of mono icon packs around there. What's special about these ones?

The SVGs use 5 decimal places of precision. That's excessive. Especially for something designed for icon use. Drop that to zero or one dp to shrink the file size.

They are clean and consistent - and I appreciate the MIT licence.

(Not a direct reply to you)

If anyone likes the icons, doesn't like the float precision, and is in a Node environment, https://github.com/svg/svgo has a bunch of config options to help optimize SVGs. https://lean-svg.netlify.app/ is a site that lets you play with settings to see what kind of gains you can get.