This feature idea has been submitted a couple of times before now. Once it received 125 votes, and the response from Canvas was some changes had been made to make the report more friendly. Recently, the idea only received 69 votes, and the response was that it didn't reach the 100 vote mark.
We have imports that run after hours, and we recently have had some enrollments that erred out. We were unaware of these until the student was already behind in the coursework. We have tried to use the JSON editor, but it doesn't always show all of the reports (after a weekend), and is still very difficult to read.
This feature idea includes creating a list of import reports. If this is a feature that is useful to your institution, please upvote this feature, and add comments of additional features to this that are useful for your institution.