So, this was just posted by the EA North American Community Manager. Glad to hear that they are still working on it, with the imminent release of Battlefield 2018
Hello Battlefield 1 players,
Today we released the Battlefield 1 Easter Update for all players on all platforms. One of the features of this update was the addition of the Mid-Round Team Balancer.
We are aware of intermittent issues with the new Mid-Round Team Balancer system and have temporarily disabled it as our teams work quickly to resolve. The disabling of this system does not impact normal gameplay or starting/ending a round – gameplay experiences outside of the MRT Balancer system are working as intended.
We thank you for your patience as we investigate this issue further. Please stay tuned to the official Battlefield channels as we will share more information once we have a resolution in place.
The Teams at EA/DICE