trippa
ive seen a good number of pugs get ruined by balance due to drunk players. ive seen more get ruined by bad player combinations, like 2 people who hate each other and argue for the entire pug, or ppl trolling glxy for fun at the expense of the pug. additionally, an elo system is too slow. ive had pugs where a new player went 2-25. an elo system will need 10 games before it determines that new player is a 500 elo player, but a captain will understand immediately that's a last pick.
it is Impossible for an algorithm to adequately balance pugs. even if you made a super ai for this purpose (big waste of time), it still wouldn't do a good job, since an algorithm doesn't play the game or join vc.