SG2 Vehicles Firing On The Move

A thread on rec.games.miniatures.misc brought up the question of vehicles
moving and firing simultaneously. It seems that a modern/future vehicle
should be able to move and fire simultaneously. This is essentially what I
wrote to someone asking how to handle this in SG2.

Vehicles moving and firing is handled abstractly. A vehicle has two actions.
If it chooses a fire action as one of its actions, it can't move with that
action, and vice versa. So, a vehicle that doesn't fire can move twice as far
as a vehicle that fires. As for passengers in the vehicle, if the passengers
are the vehicle's crew, they are covered in the vehicle's action. If the
passengers are a squad riding on the vehicle (i.e. an infantry squad riding on
a truck) they can fire as one of their own actions, but this would have to be
done either before or after the vehicle's activation.

Now, you can argue that this isn't very realistic for vehicles, particularly
future vehicles. A grav tank should be able to move just as far whether or not
it fires its main gun or support weapons. One solution would be to allow for a
move/fire action for crewed vehicles. The vehicle could move as normal,
and could fire, but the range would be increased by one range band (to
represent difficulty in firing and moving at the same time).

HOWEVER!!! There is a problem with doing this. You will run a foul of the old
"panzerbush syndrome" unless you dictate where in the move/fire action
the vehicle fires its weapon. If you allow vehicles to move and fire as a
combined action and you allow the fire to occur at any point on the table
while the vehicle is moving, you will have vehicles popping out of cover and
firing, and then dropping back into cover. To fix this, I would require that
the vehicle
conducting a fire/move action fire its weapon either before it moves or
after it moves. That way it will be out in the open when it fires and would
have to expend another movement action to get back under cover (which makes it
vulnerable to the advanced Reaction Fire rule).

The other problem, then, is having passengers fire from moving vehicles. A
simple way to do this is to allow two units -- the vehicle, and the
passenger
squad -- to activate at the same time.

I may use this as a house rule in our games. Any discussions?