This! Logged in the other day. Roughly 130 people on. Roughly 80 bish. They rest split roughly evenly between rooks and knights. Did any bishops switch to balance? Nope. Just started rolling bases. The players are the problem.
I understand the sentiment but ultimately the player will do what the player is permitted to do and human nature is to take the easy route.
If the game had a flaw that allowed unlimited ammo, the player would use it. If the game had a flaw that allowed them to be undetected, the player would use it. If the game had a flaw that allowed the player to choose a side that had more players and therefore was easier to survive in then the player will use it.
I work in the field of business improvement. We look at the process long before we look at the people. If the process did not allow an undesirable condition then it would not occur. Everyone wants to blame the people for the 3 side imbalance and it has been discussed on these boards for years. It is not a people problem it is a process / system problem.
I suspect that part of the reluctance to go to 2 sides is the fact that making maps in here is an arduous task and making 2 sided maps is simply too much effort.