Thats why i said, its "kinda" there. They could implement a Live Stat tracking system easily if they want to, they have everything they need to make it happen.
In case you didn't know, the game streams the theater mode to Activision servers in real time while you play the game, the game does not upload the theater after the game is over, it happens on the fly while you Host the match, one match is around 5mb big. It doesn't matter if you have youtube or twitch stream on or off.
Reduce rage quitting?
Most effective ways I see are improve the spawn system so there is not as much of spawn camping/killing and remove the high killstreaks from the game. I don't even use them anymore because once you get them and use them there is a 75% chance halve of the enemy team just quits so there is no real point in continueing the match or working hard to get those scorestreaks.
Myself I rage quit when my team is getting hammered and spawn killed.
Today I joined a match where the enemy team had our spawn owned (this was hijacked, were it happens most)
I avoid most of the objective based games now be cause of stuff like this.
I wont touch objective gametypes unless I have at least 1 other person with me. I must say though I've never managed to empty a lobby with a high killstreak. Lodestars, VTOLs, VSATs... the enemies have stayed in and either shot them down or taken it on the chin.
I play mainly HC mind. Dunno if that makes a difference or if I just tend to get them against non-ragers?
Rage quitting has really started to plegue this community because if you are getting beat then instead of staying in the game, they can quit and save themselves. In reality if you never rage quit when losing then your wins are much more meaningful.
I think this video is a good video related to this topic. The importance of losing.