Excluded Directories and DBs setting in templates

The description on Excluded Directories and DBs page says:

By default, Virtualmin will include all data in a servers's home directory when making a backup. However, if a domain has files that are too large to include or are backed up via some other method, this page can be used to exclude them from backups.

which is good, but useless unless configured per website. And often times end-users are too confused/indecisive/lazy to configure this exclusion page. So we would like to be able to configure this on a server-level, for example in templates, so that when the virtual servers (domains) are created the excluded files and directories were already there by default. That would be especially useful for hosts that mostly deploy certain software, like for example CMSs like Drupal or Wordpress, and know the directory structure even before the websites are created.

This is a feature requests, however if there are some ways of achieving this without introducing any new feature then please explain how to do so.

Thanks for consideration!