Thank you for your reply. I'm not sure how much you are able to communicate with that team, but if it's possible to encourage them to give players an update regarding their efforts, like you have here, I think the player-base would appreciate it. There doesn't seem to be anything at all in place regarding player behavior except for some threadbare automatic AFK & chat detectors.
A question that is definitely up your alley: Have similar changes to allowed skill range in Matchmaking been applied to unranked, or is this only a ranked change?
Only Ranked since there's no Ranks in Unranked. Unranked uses its own MMR since people treat it differently.