With this change, if we have comments about a given commit in a PR, we will now have to manually add a link to that commit in the comment so the developer knows which commit the comment is referring to.
It wouldn't be as much of an issue if PR-level code review was easier. As it stands now, the multi-commit view they just added (which is a step in the right direction) is still useless to us because it includes merges commits as well, which is not that developer's code.
So PR-level code review is still a non-starter, and commit-level code review just got clunkier.
I get that they can't support every possible workflow, but they could have at least given us a warning they were going to pull support for a feature we use (they do have those metrics) or at very least acknowledge it somewhere.