Never gave MM feedback in my 1300hrs, here it is and it is bad.

I believe time played is a bad variable for MM to use for the entire player base. Even if we totally exclude smurfs and new cheater accounts into the argument, the correlation between skills and time played is probably only somewhat strong in low ranges like 0-500 hours or something like that but after that, the correlation becomes so weak it will make the matchmaking even worse than it is now. There are causal players with 1000+ hours in this game who cant get out of gold (and probably come to this forum and complain about cheaters and smurfs hahah) and there are gamer kids who gets to diamond their first split. 

Ive said it many times before: I think most people who complain about the MM first need to accept the logic that in a PERFECTLY matched MM, you would end up with more or less 1 KD and 5% win rate after "many" games. Thats how "sweaty" this theoretically "perfect" SBMM would look like. So before complaining about the SBMM, then at least use this as a reference to assess the current SBMM. Most SBMM complainers are mad because they regularly cant drop 5-10 + kills games even though they are utterly mediocre at this game. 

My biggest complain about the SBMM, or rather the ranked system design, is that Respawn focus too much on player retention and to little on competitive integrity. Their MAIN GOAL with the design should be to ASAP put every player at the rank where they belong and this goes for both promotion and demotion, i.e faster demotion if you generally underperform at your current rank and faster promotion if you overperform at your current rank.