Continue making products designed specifically to work with a gaming rig.
If Facebook is required to use future products, I'll be buying from your competitors instead. That being said I like the Rift S, my only major problem with it is that it must be connected with Facebook.
Now here is what should change for your next iteration of the Rift S. You'll have the sales there so long as you remove Facebook integration, based on this forum your missing out on at least 2000 sales because of that.
When I'm using the headset I can see the black rings around the edge of the image. You need do a better job filling the field of view of the player entirely if you want it to be completely immersive. You should be focusing the image so that it covers the entire eye, not just the pupil when it's centered.
Don't include a microphone and speakers for this version, the ones on the S are poor quality, and interfere with the rest of your audio setup on the PC.
I already have a good headset and so do many people who already play PC.
I get that the S is the cheaper option, I think you should make a higher quality version for people who already do PC gaming.
Without including a mic and speakers you can save a bit of money, space and complexity.
I prefer to wear my current headphones over my VR, which is hard because the sides are bulky, probably in part due to accommodating the speakers.
You need to redesign the support for the rift. There is still too much weight over the front, meaning you have to tighten the headset a lot to stop it from moving around, this puts pressure on your head and leads to headaches.
I think you should move all of the electronics that don't need to be at the front to a box on the back of the headset. This will even out the weight a little and reduce the need for the headset to be very tight.
The headset doesn't really fog up when you're playing an intense game like beat saber, good job, but I find all the sweat goes down my nose, kind of gross but I think you did a pretty good job keeping the headset fairly breathable. I have a pretty small nose so my headset doesn't really rest on it unless the set is too low. I think instead of the rubber in the nose piece it should be a soft foam that can accommodate larger or smaller noses, like around the eyes.