Center of gravity in the engine pod, definitely. Just because the cockpit is the only place that swivels, doesn't mean it's the center of gravity, even though it seemed like it was in the games. We have the technology (I assume) to put the viewpoit somewhere besides the center of gravity.
Sure it'll be a little harder to dogfight in, but it always was; no reason to complicate it further by making the ship constantly swinging willy-nilly.
@Thaeris, I think the ions could be useful, even for just adding extra punch to taking down a cap ship's shields, or in a dogfight to save your cannons for the killing shot. Of if two of them are mounted on the cockpit pod-like in X-Wing-they could be useful in their own right.
P.S. Excellent model work as always, Brand.
P.P.S. Generally, the Star Wars universe tends to follow our laws of physics, wherever possible.