I really can't understand this request, why would you want the ships to move?! This is not just a graphics issue we're talking about, here.
Fact 1: The capitals are lumbering behemoths, and cannot turn quite well.
Fact 2: The capitals have set weapon slots located on set locations on their hull.
The KOL battleships, for example, have their heavy-duty guns in the front, and they already have to lumber about in order to bring their weapons to bear as it is, especially if the enemy is behind them. If they would constantly move, this would hurt their damage capabilities, as they would constantly have to compensate, which will take time.
Even a second of delay can mean the difference between a beaten-up, barely surviving 10th level expensive captial ship and a big bunch of floating space debris. And this is not a second of delay we're talking about here, this will amount to much more on heavy battles. Better explosions is a much more reasonable request, in my opinion, as it has no gameplay ramifications what so ever.