> did I mention "noisy"
You did, but I have no idea what you mean.
> it's coming from Atlassian
One more reason to prefer Slack. I've had a lot of experience with Atlassian tools, and it's almost all been negative. Everything about Atlassian is slow: Their products, their support, and the pace of development. Submitting a bug report to Atlassian is an exercise in futility; if it's critical and affects hundreds of people, you MIGHT get reply within 2 years; you certainly won't get a fix that quickly.
One bug I hit was opened in 2007, got an official response saying "maybe we could look into trying to fix that" in 2009, was officially added to their backlog to fix in 2010, and was announced as officially fixed in 2011. Spoiler: It wasn't fixed, and for all I know, it's still broken.
The worst thing to happen to Hipchat was being purchased by Atlassian; it's when they stopped innovating and started stagnating.