All tweaks which we have added to genesis child that we use, have been added to the Genesis Sample theme. We have published the theme on GitHub for all Genesis fans Framework.
You can use the theme as it is or add your own code.
The structure of the classic Genesis Sample theme has not changed. All edits are contained in functions.php and style.css,
The archives contain changes for the better speed, and some UI improvements.
It contains a custom code for clearing autoptimize's cached files (//* Clear autoptimize cache at 512MB iGuRu.gr). We use this specific code before its release Plugin which provides the same mode.
You can try or modify the theme from Our repo on GitHub
Style.css contains code that you may not need, as it contains edits needed for the plugins we use.