They didn’t go too far with spacing, consistency is way up, generally everything feels like it’s using the same standard set of widgets.
It feels in a weird way just a little slow. I’m not sure why, I even thought maybe it’s my Chrome or something. I noticed hovering a list item had what felt like a small delay. Turns out it was just the animation they used to fade in/out. I think they messed that up (fade in should be near instant or else it feels laggy).
That said, as a UX specialized dev, I appreciate it overall. Don’t like Facebook or even use the app much, but the design and tech are better overall.