I noticed that as well on my comp. If I'm fighting 4 or 5 garthian cruisers ,and they start producing fighter ships + any other ships are around, the game starts lagging bad.
Yeah that's my only real complaint, more stuff. Hopefully any day now the mod community will get their hands on this
Yes, it's possible to create battles in the simulator that are way bigger than any you'll see in the game itself and it'll be taxing to any system. We simply chose not to limit the simulator too much because it's your choice to do so and choices are good...
Bwt, if you click at the edge of the screen, your ship will move in that direction until you tell it to do otherwise (It won't escape from combat until it hits the edge of the map).