I've never been too impressed with Star Wars game releases on the Atari 8-bit, or even 2600 for that matter. The Domark version is a lot better than the Parker Bros. version of SW arcade, but I still think it could have been much better, especially with the frame-rate. If you've never seen Mercenary: Escape from Targ or Tomahawk helicopter simulator by Datasoft, check them out on Youtube or where ever, they show what vectors can really be like on the A8. And Mercenary even give you the medium-res or low-res (faster) version at the beginning to choose from (48 or 64k versions: NTSC 160x96 or 160x192)) and even the medium-res version is a lot faster/smoother than Domarks low-res (160x96 NTSC) Star Wars. Tomahawk is also medium-res (NTSC 160x192, not the max 320x192). Or even F-15 Strike Eagle by Microprose.
I hope some home-brewer will make a clone/hack soon, with faster frame rates.
The "REAL" Star Raiders II (as seen in another thread) is another example of a good frame-rate with 3D, though in that version, they went with vector-dots for 3D instead of full vectors to achieve a much smoother game.
I was just looking these up on youtube, Mercenary A8 videos only show the medium-resolution version, impressive, but not as fast as low-res. Tomahawk only has one video, 28 seconds, and it's high-altitude so it doesn't show it's speed well, like when flying above tree-tops, so that one isn't good to see for an example.