I'm so glad there is this topic so we can all share our views
I've got a few comments/ ideas:
I was thinking about the flamey topics where people post first and think later. We could maybe have a pop-up that says 'Are you sure you want to post this?' or similar so people think twice and don't reply in anger.
Leaders. I think we need leaders back, but lots (like 1/2 the regulars lots) because then we'll always have lots of people on who can help if things get nasty and then we won't have to wait for a few people to be on (we can't always expect the team to be on to solve our problems straight away). This would stop things before they get extreme.
Quick reply. If someone helps you, it feels like just liking that post isn't enough. People always say 'Thanks!' and just dodge the character rule. Could we maybe have quick reply buttons (like on iOS 10 iMessage) so the Forum isn't clogged up, as the character rule is there for a reason.
Flags. Instead of a flag counting automatically to your flag count (to hide topics etc.), the first flag someone does could be a warning. After a few warnings, then the flags become legitimate.
I'm aware that some of these may not be possible as Discource may not offer them...