Hello there!
I joined this forum just to add my 'insights' regarding this team balance because it has been my 'bane' ever since I encountered it on CEONSS. By all means I'm no statistician but I think as much good intention this team balancing thing has, it is abusable and it usually moves the 'carries' from one team to another. In many instances such calls mixed with some abusable mechanics such as leaving and rejoining ruin a head to head match up, giving e.g a 3 round point edge to the losing side in a 7 - 6 state.
The team balancer also seems to make bad calls because it recognizes PPR only seemingly and since the current ruleset heavily favor spammy and straight up suicidal gameplay, some people have inflated PPR despite the skills mismatch the achieved score. I'm ponting this out because the way the ammo distributed, it gives e.g shock combo spammers an edge while the limited ammo on the minigun and the link gun removes any potential counter play. It is technically the TAM set up but unlike TAM, in Freon death isn't permanent as long as one person is still standing minus some instances, so I see no reason to fine tune the rules, so that they favor other type of playstyles and weapon choices. I also don't see any reason not to have what TAM used to have that those teams who have the edge has some minor debuffs e.g health and shield capped at e.g 90pts instead of 100pts.
Long story short: as long as the gameplay leans in favor of certain players (it evidently does), the team balancer won't do many good and besides TAM rules already had some mechanics to mitigate extreme gameplay edges.