Tinker has great support for excerpts. Using the theme customizer you can also disable excerpts on index and archive pages. Read more →
Tinker will use your Gravatar profile image for the logo by default. You can always disable that using the theme customizer.
Tinker uses the built-in WordPress theme customizer for changing theme colors (text, background, header), setting body and heading fonts, enabling Gravatar profile image as logo, activating breadcrumbs and featured images.