Allow bigger range for duos in ranked?
I'm not trying to say like in the old days when anyone could duo with anyone in ranked. But I'd say it'd be better if you could duo with anyone within 2 tiers of you. Like if you're platinum, you could duo with people as low as silver.
You might try to say that Riot, and perhaps you, think that games done by duos this far apart are of lower quality. While this is true, it's not by all that much lower of quality. On the flipside, since I can't duo with my silver friends seeing that I'm platinum, then I use a silver account to duo with them instead. And guess what, that causes the game to be a huge amount lower quality because my team has a huge advantage.
So really, I think it would lead to them using the lesser of 2 evils in order to play ranked with their friends if you widened the range of players you could queue up with.