> Packages up for consideration include, Breadcrumbs, Sliders and Sections, Mobile Navigation, Color Control with Transparency, Appearance > Theme Name Page, and Standard Template Hooks.

The autoloader is not really needed as I think theme authors should be using Composer. It's a standard in the PHP world right now.

The customizer button is already there for a long time.

These 2 packages are not what I expect. I'd love to see implementation of the packages above. They are truly improvements.