Ranked w/ Leavers/AFK's

So, I'm a relatively new player that's finally been giving a shot at ranked, and after being immediately qualified for Silver V, that got quite the motivation for me to keep going to see where I can go. But over these past days I've been noticing something (something non-ranked games also suffer from, but au contraîre, in non-ranked you don't actually 'lose' something, so it never came as severe.) This issue nonetheless seems to be across many more leagues, from Bronze to early Silver in whole:

'People who leave the game prematurely, either through displeasure, unacceptance or disconnection.'

What has been bothering me is that behavior like this - albeit already disallowed by the rules - is actually having an additional effect; It drags the whole team under, letting them lose LP and their Ranked progression over reasons that were not in their - or their opponent's - control.

I'm going to propose the following idea, and mind you, I'm not as experienced in ranked yet to know what/how other leagues are experiencing this problem with, but I would like to see a measurement that prevents the whole team from crashing down in rank if a player prematurely leaves (or goes idle ingame)