I made my comeback last night, and as far as I'm concerned, things are better. Had it not been for this change, or the reintroduction of larger maps, my sabbatical would have continued. Maybe there are people who are in this game for the reset/winning the war. For them, it makes perfect sense to join one particular chess piece en masse, and then go about their business of horde porkrollering through the arena. It is THAT mindless gameplay that the balancing algorithm has addressed. (hate the word "balancer") I'm sure all sides/chess pieces have adopted that style of gameplay from time to time. Latterly, it was the rooks. But other chess pieces do it too. As soon as one side would be losing, the other two would move in. The perk potatos would desert the losing side and switch to one of the winning sides to enjoy the spoils, and to reap the perk harvest.
I don't log on to win the war. If I were to play for an hour or two, it might be nice to capture a few bases, working as part of an organised team. But I'm not going to stay logged on for the 8 hours, or however long it takes, to be part of any reset.
The new system is a first step. It's almost certainly not the final solution, but time will be needed to assess MA behaviour before the next adjustment can be made.