Having a "Submit pages for Approval Option" or a "Publishing Manager" is something that would be greatly beneficial, especially to teams with numerous website updaters or those responsible for vast amounts of web content. This option currently exists within Page Manager which allows web updaters several options when requesting approval for a web change they have made.
The option allows them to note specific changes, includes site breadcrumb to show exact location within the sitemap, and includes a list of site administrators they can select through to receive the web review request. If an option like this could be made available in Composer and work in the same way, it stands to greatly improve overall web management workflow and communication concerning website updates.
We have 90+ web updaters university-wide, and see this as an essential piece for our web content management so we are able to give updaters an easy way to notify us when changes occur and what those specific changes/details are. The alternative option is to advise updaters to go through outlook or a separate email platform which leads to lack of consistency and many times, the potential lack of details concerning changes.