I'm having an issue with importing ArriRaw files on a MAC. I've already found out this is a known bug (known issues in After Effects CC 2015 | After Effects region of interest).
But I was wondering if there's any news/a timeline on fixing this?
That's a good question. I haven't heard them mention any time frame for a fix for this. At least you can transcode those files in Adobe Media Encoder or work with those files in CC 2014! (One of many reasons to keep that handy.) If you don't have CC 2014 installed, you can install it through the CC app. Instructions here: How to Find and Install Previous Version of Adobe Apps in CC 2015