Well, I think you should consider dividing important topics like Updates and General news into two separate sections, where one of them would contain only posts by team (with normal users not allowed to post) and the second one the discussions about them. That way it would be easier to see that there is something new- changelog, quick bugfix, important note...
Otherwise the important things tend to dissapear under a ton of nonsense like congratulations, hype, spam etc. and tracing back some important post can be nearly impossible.
We pretty much already have that. In our 'News' section, our General News board (https://forum.legendsofequestria.com/index.php?board=2.0) contains just news from the team (the stuff that shows up on our homepage), and our Game Updates board (https://forum.legendsofequestria.com/index.php?board=3.0) is used for changelogs. Players aren't able to create new topics in these boards, so you'll only see stuff from the team being created in there - although obviously, everyone can comment on those posts.