Yeah, I mentioned that here: Zwift Racing Score - Next Phase! [September 2024] - #501 by SeattleSauve
It seemed with the few races I looked at … in general that anyone around top half got a score bump, everyone bottom half got a score drop with only a few exceptions - regardless of the ZRS of the people around them.
I have a hard time believing that’s the way it actually works, because that wouldn’t make any sense - it should be more about the ZRS of the people you beat or lose to rather than top/bottom half.
I’ve only looked through a few races though, but what I saw didn’t make a ton of sense to me.