I don't understand why we have to get ****ed over by AFKs in ranked.
If you had a teammate that was afk for 10+ minutes in a ranked game no one on your team should even lose lp. Or at least lose half or something, and your mmr should definitely not be effected. The one who afk'd should still lose their lp of course, and the enemy team should gain theirs, but I don't see why the rest of the team should suffer.
And if not, turn the afk player into a bot at least, so he can maybe be somewhat productive. Sure, the enemy team will try to exploit the bot and kill them, but they shouldn't even know its a bot anyway. And even if they did, I'm fine with playing protect the bot as long as long as the bot can do some damage or soak up damage in a team fight, so that we at least have a chance in a 4 v 5.