It might just be me, but when updating an SPFx solution using the CLI, I always output the report as an md file, and I always scroll to the summary to get the aggregated pieces of what I need to do.

So for me, having a default ouput as a file named something like upgrade-1.4.0-1.5.1.md, and also having the summary at the top and not at the bottom of the report would save me a few keystrokes and seconds :)