It's better than the old theme, but the PHP code is still a mess, like the whole codebase of WP in general. For example, there's lots of duplication in the HTML

It's better than the old theme, but the PHP code is still a mess, like the whole codebase of WP in general. For example, there's lots of duplication in the HTML in many templates. The functions.php still uses lots of global functions with long_underscored_functions_with_prefixes instead of a simple class with short method names.