IMO player statistics should matter in matchamking, if you would more or less be matched against players of your own skill, the games would be more enjoyable, less snowballing (which you can get like 5 times in a row = not fun) as well as its easyer to improve your own skill if you play against same lvl players. As your winrate increases, so would your MMR rating and then you get matched with better players, the fact that the MM system only looks at ship types/tiers seems utterly stupid to me