Its been back since convergence.This seem more to just wrap up a story.I might be somewhat out the loop butI thought it firmly restored the multiverse. I know they've toyed with it between hypertime and new 52 but it seems to be back in all its glory.
Geoff Johns has played around in this book and others like Infinite Crisis that "The DC Universe always begins with Superman." So Dr. Manhattan playing around with it during the Flashpoint fundamentally changes Superman's character and origin, which in turn sends a ripple effect across the DC Universe.
So,
Dr. Manhattan moves the green lantern out of Alan Scott's reach = Alan Scott dies and never becomes Green Lantern = No JSA.
No JSA = Superman doesn't start his career until later = No Superboy = No Legion of Super-Heroes.
Superman doesn't start his career until later = Not there to save his parents from dying in a car accident = Angstier New 52 Superman = Angstier New 52 DC Universe.
New 52 has been finished since new 52 superman merged with post crisis superman and we got rebirth though, right? This just erases it more I guess? Seems pointless tbh.