Old one better. Just my personal opinion.
Here is why:
I use to be able to browse the forum with shortcut methods. For example, if I was in the GTA IV forum reading a thread, I can quickly go to the GTA V news section in one click of a button because there is a side bar with all the subcategories to select from. This one, you can't do this. I always have to go back to GTAforums home, then proceed to the subforums that I want to visit.
Just my two cents.
(my reply to the person above) (typing this because the quote didn't seem to work)
you can collapse and open the sidebar same sidebar as the old layout notice the 3 arrows (<<<)
Thanks for the notification.