@davidep, thanks for the tips. 
I’m holding the changes and thinking to dismiss them due to some quirks, as @giacomo feared.
From the UI seems to work well, but we may find packages with ¿circular dependencies? difficulting its removal from CLI, or other quircks:
- circular dependencies ¿? between dkms and pfring-dkms, and between cups and ghostscript-cups
- uninstalling cups removed acl package (pre-installed with the system) Maybe I did something wrong (in yum.conf) before installing/removing it.
- Normal ¿?: @nethserver-mail: removes nethserver-roundcubemail (optionals), nethserver-getmail (optionals)
- Same as happens without the changes: @nethserver-web-filter removes squid (with @nethserver-web-proxy installed)
What are your thoughts?