I'd be great if there is the ability to uncollapse part of a collapsed thread.
Example: If there are 5 messages in a collapsed thread, but I only want to uncollapse and see the last two messages in the thread. If I can do so by clicking on the greater than symbol to uncollapse the last two messages.
I agree, that would be cool. But if JIRA comments behaved just like whatever Confluence comments do then I'd be happy.