Match the G2 graphics or surpass them. The oculus graphics are so ****** I can't tell a P-47 from a BF-109 from a very short distance away.
Improve the refresh rate. If heat was a concern, instead of cheaping out and limiting it, think out side the box and find a way to cool it. Or use parts that are not so heat sensitive. Perhaps you don't realize how many people want VR for flight combat sims. You can not effectively play if you can not see enough detail to ID a plane because the screen is to blurry.