Oh, yet another topic on the sidebar. Really?
Only if you want it. YOU choose what goes on it. You may wish to read up on it and try it out. I'm now excited that if they eventually allow us to drag and drop (or) change the order (assign sequence number to them?) Anyway, IIRC, the sidebar will be more like YOUR space how you want! 
??
WHY
Why do you feel the need to mess up a perfectly good sidebar? Why are you moving notifications, friends, and messages to the bottom of the sidebar? What's wrong with leaving them where they were? Why do you hate leaving perfectly acceptable UIs alone? If you want to change the UI, ADD A TOGGLE
That way, if someone would like to use the new UI, they can toggle it on. If they don't like it, they're not forced to use it.
if u really wanted to use tampermonkey and maybe stylish. itll take a lot of coding but i think its possible
??
I thought they were talking about the new NAV bar that they're beta testing now. If your question marks were about puzzles, please explain why you posted your question marks. Folks on this website always try to help people here.
Oh, yet another topic on the sidebar. Really?
Only if you want it. YOU choose what goes on it. You may wish to read up on it and try it out. I'm now excited that if they eventually allow us to drag and drop (or) change the order (assign sequence number to them?) Anyway, IIRC, the sidebar will be more like YOUR space how you want!
Making the site/app personalizable is always a move in the right direction. I believe there is no universe in which having countless of topics stating "revert back the sidebar" is not counterproductive. There's definitely room for improvement and it's makes much more sense to make suggestions for changes and supporting them. That was my point.
idk i got used to the new ui so im fine with it
Me as well and I've only been in Beta for two hours - I like the changes and love the new pin concept, by the way. Change is uncomfortable but usually for the good, sans minor bugs. It'll settle (as we will) as they identify (thanks to us) what needs to be tweaked!