The official Matchmaking blog post

@Cheese9ManWe'll see, I guess. I thought I saw imrpovement a few weeks ago but it seems like that disappeared and now I'm back in the "10 horrible games just to get 1 good one" world for solo queuing pubs.

The post really doesn't go into how skill ratings are calculated, just how they use them. I always get the feeling the game thinks I'm a 7 or 8 when I'm really a 4 or 5. I don't want details of the formula or what my actual skill rating is, I would just like to see what things make up that number.  Level doesn't mean anything relative to skill and their post seems to confirm it, so what else do they measure to calculate a skill rating?  Do they care about how lopsided your kill feed is when you die, for example.

Using the highest rated person's skill for premades is just wrong, IMO. The lower skill players tend to pull squads down rather than the better players carrying the squad, especially when the skill gap in the squad is bigger. They've been operating on a completely false assumption when matchmaking premades so I'm glad that's gonna change at least.