I thought I'd write a post of my own since many other commenters are complaining about things I'm not bothered by.
At any rate, the new reaction bar is obnoxiously obtrusive, both visually and as a click target. I would very much like to see reaction picking and other similar tasks (quoting, pinning, deleting, etc.) available the way it was before this update.
(Incidentally, the "disable reactions entirely" setting is one I *don't* want to turn on. I *like* reactions; I just don't want to be pestered to react to every. single. message. I let my mouse pointer hover over.)