Well, yes, the game engine could be better. There are only two limitations to make it better. Time and money. Within these two limitations you get simulators, BS and A-10, that are currently used by actual military to train their pilots. So, if you can do better, I'll be more then happy to pay you $60 for your product.
In the mean time, save some money, select components wisely, and build you a rig that will up for the task. And yes, demand better from ED, but within reason.