There is a similar idea in place in Tribes2. One person carries a targeting laser which displays a point on the other players hud where they should point their weapon in order to hit the painted target. Works very well for mortar type weapons and such. I think it would be a good idea for an artillery weapon. The balance issues can always be worked out when they decide on the blast radius and damage of said weapon. People have pre concieved notions of how powerfull a bomb should be and they imprint that onto a game for some reason. This is a fantasy world in planetside. There is nothing that says how powerful anything should be, and therefore nothing to dictate how it will affect game balance.
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