I don't think it will be coming back since technically couldn't it be causing Riot some problems in the law dept?.
I mean, I wouldn't be too happy to have an account I've dropped hundreds of dollars into, banned, or even perma banned due to a bunch of nim rod trolls spamming the punish button, and riot letting the toxic community vote on... who's toxic... yea cuz that'll work right?
Riot says it was highly accurate.. I can tell you it isn't. I've been banned in the past not once, but twice by Tribunal terds. (no offense). The worst thing I said in any of my matches that got reported was "omg this team"... that's it.. nothing else. That isn't against the EULA, or agreement you agree too every time you play this game.
The other things I was reported for was "feeding" which passed, despite being the only positive on my team, and other reports you can't even see on the joke of a tribunal page, such as "assisting enemy team". and yada yada.
Tribunal didn't work, doesn't matter what Riot says, they're covering for their fail system.
What I do want to see though, is riot show they actually give a crap about their god awful community.