One thing I am hoping is a far greater view distance for space maps. In GC (not bashing it, it was just a drawback) you couldnt see any other ship or space station till you were relativle close to it (comparing to the size of the map). This would make it alot more immersive, it would help to know that you are still within the battle, and would be plain coool.

Now as for lag, I doubt there could be ALL that much lag from it just to see a few large ships across the entire map. Maybe all the little ships  would cause some though, so simply make the draw distance on them shorter than that of the large ships and space stations.  It would be simply awsome to see the enemy fleet or space station from all the way across a map