I was about to say that the Reverb G2 uses aspherical lenses, too. But I just googled to verify my understanding first and discovered that I’m wrong. The Reverb G2 has “fresnel-aspherical” lenses! I’ve apparently misunderstood for a long time.
It looks like PSVR is the only other consumer headset that hasn’t used fresnel.
Now I get it. Fresnel has inherent blurriness which the Aero is avoiding. But that puts it into largely uncharted VR lens territory with optical artifacts that fresnel lenses don’t suffer from. It’s not just a matter of increasing the resolution of the displays behind it. Fresnel lenses wouldn’t be able to show the additional resolution beyond a point.
I withdraw my comment about the Aero not having an excuse for its optical issues.