"Is there anything else you can think of? "
Not related to ai specifically, other than turning down the traffic %.
Beyond that it's a matter of tuning your system to give FS as many resources as it can....
Adjusting your FS settings to get as much of what you want while maintaining a decent (20 or so)FPS.
The
Tweaking & Overclocking is a good place to start looking for system and FS tweaks that may help. When asking for tips on FS performance, it's important to include your system specs. At minimum, identify your CPU, amount of ram and your graphics adapter.
Dave
At that time [1909] the chief engineer was almost always the chief test pilot as well. That had the fortunate result of eliminating poor engineering early in aviation.