There have been FAR to many repeated posts about ships moving. Hopefully no more. It isn't even an issue of them moving, it is actually an issue of scale.
I have come to realize (after also being dismayed initially about sitting ships) that it is a scale issue, not a mobility issue. As has been said a few times, the frigates in games like HW don't move either. The problem then is scale. The capital ship scale compared to the frigates in this game is much more pronounced, and visually we have come to expect ships that are so much smaller than the largest ships to be movers. Visually, we expect ships that are say "half" the size of the largest ship to also sit around while firing. The scale difference makes it hard for us to visually recognize what is classified in this game as frigate as corropsonding to a "frigate" static-firing class. The easiest remedy to this would be to simply make the frigates larger, and then I'd wager that people would instantly stop complaining about mobility; they would think "a ship this size isn't supposed to move." But because of the size difference, we associate the ship with units such as a HM "corvette" and not a "frigate", and thus expect it to be moving around similarly.
My two cents. But unfortuntely, the bank of ideas has stopped collecting money.