[rbbitbucket]

Bitbucket Server PM here. I wanted to address some of these points as there's good news on many of them...

Regarding PR comments and line comments, file level comments have also been available from the beginning. There's a comment button above the diff view for this.

Regarding line comments being "lost", it's true that when they become outdated they can be harder to get to, but they're available. If you go to the activity tab all past comment threads are available to help make sure you've not missed anything. We're working on ways to show outdated comments in the diff view, and beyond that we're looking at adding more to our search capability for finding comments across pull requests.

For author and committer treatment, we do respect the two concepts in Git, but you're right that we don't display them clearly in the UI. We added coverage for returning both roles in the API back in 5.0, and at some point we'll probably update the UI to display it.

I'd love to hear more about what you feel is lacking in the diff view. We're doing some work there now so perhaps we can cover off your use case (or plan to already).