Draft games should try to mirror premade's compositions.
There's nothing worse that queueing bot or supp in drafts. You have 0% of having a botlane duo that way, but almost all the times, the enemy team will. Shouldn't MM in draft norms try to place botlane and jungle+lane premades into a game with a premade of the same (or similar in case of jungle+lane) composition? It feels like if you're just filler to complete a match.
I've been in quite a lot of matches with 4 man premades, or even games where I was the ONLY solo player out of all 10 players.
BTW, if you're wondering how I know how they are premades, I use a site that tells you if players had multiple recent games in common.