comments: 42 | comments upvotes: 122 | last posted: yesterday | expand
- well, clicks "expand", making an unambiguous indication of desire to view these
- clicks some comment URL, which unambiguously indicates the need to show this specific comment
Be prepared to deal with it. I'd go as far as suppose that without measures to tame mentioned shock, such a change is at high risk of rolling back. I would expect brute-force implementation to cause much turmoil, even more than massive and immediately visible deletes and review abuse caused in the recent past.
One possible way to tame the shock could be to collapse comments only a day or two after the post creation (or after whatever is average period of active commenting on created posts). This will give users sedative feeling of being able to use comments in a familiar way, like nothing has changed.