Ancedotally, someone close to me who works at Meta has cited several outrageous examples of WLB'ers doing almost no work. Perhaps a few bad apples spoiled the bunch.
That's frustrating though. Just put those folk on notice, fire them if they dont improve, or fire their managers if they cant fix the problem. baby, bathwater, etc.
I get the feeling that remote employees do less work in general, except for the few who really make an effort to stay connected and on top of stuff despite WFH. I've been guilty of this at times, and when I got back into gear, I noticed how slowly everyone else responded to stuff. It's not just a few people going AWOL and ruining it for everyone.
i know that's the generic thing to say, and its not untrue. But in this specific case i am curious what went into this decision, as I still have some small respect for the builder focused culture he created at FB for at least the first ~half of its life.