For a better code quality you have to collect and evaluate statistics and information about the code: The code must conform to best practices as well as in-house rules.

I have developed a method that collects and evaluates such information: For example detecting superfluous code, interleaved function definitions, checking whether the right data type is used, etc.
It does not matter if packages or nested procedures are used. You can integrate the program with your build management tool and create a report on the fly. This way, you can measure the quality of your code at any time.

Please contact me if interested.