I've been complaining about the ratings aspect of a match-making feature for some time now, however sadly without much in the way of a response.
We know that an auto-match feature is in the works (hopefully at least reasonably similar to the one used on Isotropic), however hand in hand with an auto-match feature to pair players with 'similar' ratings up is ensuring that said 'similar' ratings actually mean something.. something which I have been concerned about for some time. Basically, the rating system Goko implemented is very bad. First, it does not appear to increase in accuracy of ratings (in any reasonable fashion) as number of matches increases (if anything, the system gets less and less accurate as number of matches increases). Second, the K-factor (or whatever mechanism they use to calculate points won/lost) they chose is *much* too high.. ratings fluctuate wildly (part of the inaccuracy of #1), which may be partly related to; third, the 0-10000 point rating scale is too large (no other game or sport uses a rating system of anything remotely like that interval). Fourth, the developers seem to be treating the rating system like a point accumulation system rather than a rating system. As an example, when the rating system recently broke (it temporarily reverted players to zero rating after any match), the developers awarded all affected players a 'free' 300-rating-point bonus, over-inflating ratings and adding more total points into the overall point 'pool', further decreasing the accuracy of the system.
I've previously suggested that the developers look more carefully at rating systems like TrueSkill and Elo (particularly how Elo was applied to games of combined luck and skill like Backgammon), or if their intention is to have their rating system be a progression-like point accumulation system (i.e. a system of levels, where players always feel like they can make upward progress) that they should do that instead, but so far we haven't heard any response other than 'auto-matching will fix our rating system problems'.
As a note, in case anyone is going to suggest Goko just use TrueSkill, it may be relevant to note that TrueSkill is not free for commercial developers (it is a proprietary system owned by Microsoft), which is probably the reason they didn't use it.