We're on 4.10.1, so I think we have most if not all of what you mentioned. Thanks for the great open source product!
I should be clear, my own UI complaints are minor, but I want to acknowledge that people expecting a 1:1 copy of Slack won't exactly find it. Mattermost works well for us, but I recognize that an enhanced UI with tight media integration must be important to many people, otherwise Slack would not have become as popular as it has.
Threading is really the only gripe I have personally - I don't like how it works, and I don't use it much because of that. But then I also don't have any real observations about how it could be improved either, and not using it (and basically operating as if it's IRC) is a perfectly fine solution!
I should be clear, my own UI complaints are minor, but I want to acknowledge that people expecting a 1:1 copy of Slack won't exactly find it. Mattermost works well for us, but I recognize that an enhanced UI with tight media integration must be important to many people, otherwise Slack would not have become as popular as it has.
Threading is really the only gripe I have personally - I don't like how it works, and I don't use it much because of that. But then I also don't have any real observations about how it could be improved either, and not using it (and basically operating as if it's IRC) is a perfectly fine solution!