We often debate a lot in our game development team, while we individually do internal announcements as well. We often happen to find ourselves with subjects that does not necessarily emerge from the Maniphest section, and what normally would suit a general messaging board. The Phame section would actually have been acceptable if the happened to support the internal comment system. We don't want to rely on external solutions like Disqus, as it's not supported by the search system, among other reasons.
When it comes to evaluation and critique of graphical assets, the Pholio section served us well so far. But similarly, we often deal with different types of assets, which also includes audio for instance. A complete digital asset management would be great in this case.