This idea has been developed and deployed to Canvas
As an instructor of a language course with a lot of assignments, the format of having the names of the students show up on the main screen and the title of the assignment as well was much better for me. I noticed that this has changed recently which was a bit frustrating.
I realize I only have to click on the show students names to get the list but that is one extra step. Not sure why that has been installed.
Also one student said she did not know which assignment I was talking about and since I do not know what the message looks like at their end, I cannot tell if the message has the assignment title in it automatically anymore or if I need to add it now.
Comments from Instructure
Instructure's Product Team acknowledges that this idea was not completed in its entirety as there are technically two requests within this single thread. This idea is being marked as In Beta to address the automatization of the subject line. There are no plans to change the workflow that includes the checkbox to show the list of students' names.