Here is a UI concept we made. Not really a graphics designer. It features:

• A home page reworked from the ground up with a news section and content
• A lighter bit of background below the compact header, similar to the regular original header
• the side bar has been moved from the top left corner to just left of the page content and is on by default (features notifications, pinned members, and simple settings like dark mode, potential language changing, and more)
• A new bar on the right side separate from the middle area, with forums, collections, and ads
  

(All of this is definitely not an excuse for widescreen support. Lmao.)
Also we'd also put PMC social medias on the blue left side bar, too. We didn't feature it in our concept art.
Double also, jsyk, the right side bar isn't meant to be attached to the right side of the screen.