I couldn't find any suggestion for this, so here it goes:
Everyone hates deadbeats. Everyone wants to play with players who have good ratings. But ratings right now are composed of purely subjective information such as an evaluation of play capability and team-work and you can only add a flag for deadbeat. I'd rather play with someone who at least takes turns even if they are not meeting my subjective definition of "strategy". But by not including the performance at taking turns into the rating, I think that the "player at a glance" approach currently utilized is missing a key component.
I don't have access to all the statistics, so the following would certainly need to reflect along actual turn-taking percentages. But here it goes from a purely arbitrary basis:
98-100% turns taken, 5 stars
95-97% turns taken, 4 stars
90-94% turns taken, 3 stars
80-89% turns taken, 2 stars
< 80% turns taken, 1 star
I would assume that this would generally make most regulars 5 stars, which is good. If I knew that 1 in 20 turns on average, my teammate would miss a turn, that is something I would be mildly concerned with, but might still be willing to try. Up to missing one out of 10 turns is not good and would be an area of concern. Missing up to 1 in 5 is a disaster and well earned of the 2 stars. Clearly missing more than that will not be tolerated and 1 star is of obvious demerit.
Anyway. I think giving the feedback rating a more absolute component would help give an improved idea of a player's merit.
Review away! Sorry in advance if this is duplicated.