The problem with the Rift S that some people have talked about is the Refresh Rate.
The Oculus Quest has an even lower refresh rate at only 72hz, so if you think 80hz is bad then the Quest is going to be much worse.
Honestly 90hz feels to low on the Rift 1 at times, so to me they should be concentrating there time and efforts on bringing out a better headset with a higher resolution and refresh.