Its our ground-attack aircraft, but in most cases it can't compete with the Il-2. Its much more difficult to use effectivly, and some never can, it carries only 1 bomb of any considerable size, the 50kg bombs requiring near-direct hits to be effective.
And the G14 isn't used in some scenarios. If I'm in a G6 in a scenario, I want the tater gun, since without it, you have to choose between acceptable manuverability, or good snapshot capability.