Atlassian is a bootstrapped enterprise software company. That alone should earn them a lot of respect.
I think that Atlassian's pace matches their customer's wishes. I believe that Bitbucket is more or less on ice, functions as a free GitHub for private repos, and provides an outlet for Atlassian to try to convert people into enterprise clients, and I think this is their intention for Trello too.
Enterprise clients do _not_ like rapid change, so I think that JIRA/Atlassian is on track. In the last 3 years, JIRA has integrated GreenHopper as JIRA Agile, and I don't know what/if anything else they've done, but I don't follow JIRA closely.