The maintainers are an all-volunteer bunch. If the suggestion gets picked up as a student project, this means that it would be done during a school term, not for example, by an intern currently ready and waiting for assignments.
I like the idea to add cover images, because it represents another reason to have a right-hand panel as in my suggestion to dock the entry editor on the right. It is also very handy to display the first page of a PDF as the cover page of journal articles, which is something other reference managers do.