Perhaps a means to combat Warzone Farming: A Mercy Ruling Vote.

Basically, if one side is getting obliterated and farmed, a prompt will appear on the side of the players being farmed.

If there is a majority in favour of pulling the 'Mercy Rule', the game ends.

Just to be clear, the score gap MUST be high, and there must be skewed team K/D Ratio, that is, one team is killing the other much, much more than they are dying in a period of time compared to the losing team.

This won't stop farming, but it might hopefully make it more of a chore if one side isn't getting the maximum score out of the farming endeavour.

The only issue with this is how to implement such coding that works effectively and reliably. Furthermore, if solo-queuing, then there'll be the issue of how the 'Majority' voting system works, especially if some players want to keep going, and feel they could turn it around. However, given that a Unanimous vote would be nigh-impossible if one player insists on slugging it out with a superior force, so a Majority vote is the only way.

Of course, this problem could be solved if they made it so teams only matched with teams.