Hi Karl!
Regarding a color picker with swatches / global options, this is a great feature request and a huge design time-saver!
For design tokens, we are currently beta testing some related technologies that will allow us to make that possible. In the meantime, Korey’s post How do I use my site's css and classes on elements in Builder pages? and some clever use of templates and symbols are currently the best way to create/maintain styles throughout your project.