Also note that the mouse controls in FreeSpace and FreeSpace 2 never sucked. Some people just don't like how it works, or never bothered to use it effectively.
I never had any large problems; the main trick is that moving the mouse faster is not going to move the ship any faster so you end up just running out of table space faster. If you move the mouse at the speed the ship can turn, you get maximum amount of turn from one sweep over your mouse pad/desk/floor. I can turn Ursa about 720 degrees (two full circles) without moving the mouse in the air, and my table is not really very big at all.
Of course, I prefer a joystick, and joystick sensitivity controls actually have always sucked in FS2, much more than the mouse control scheme ever.