some suggestions, discuss!

I thought LOS was due to their sensors around their bodies

Play a bit of Spring 1944 http://spring1944.net/ and let me know how you like directionality of turrets on tanks and artillery, as well as directionality of armour on tanks. Typically vehicles are weak at the back so easier to destroy if you can get behind them.

This is not directly directionality of LOS, but it's easy for a guy to turn their head, but slower to turn a turret. In some limited light mode (like dark maps and people using torches in a FPS) it makes sense, but I'm not sure that having cone vision would work in ZK even in a special mode.

While Spring generally has nice unit controls, they completely lack detail for such maneuvers. With the current ZK controls I'm already annoyed by vehicles not being parallel to each other after line move, trying to control every unit's attitude manually would be hell.