Yeah I don't like that the system only seems to be concerned of getting balanced averages, and perhaps it should concern itself more into actually getting balanced medians instead.

Game quality becomes instantly better when there is an even number of ranked players so that you get at least one on both ends. Which can also get skewed by non ranked players that are actually ranked players in disguise but haven't been ranked for ages.
And then there is jobs, some people are just trying to get to grasp with a jobs they do not know and the hidden MMRs aren't concerned by having a per job rating instead of a global rating.