I wouldn't call it that.
If anything, I would call it 4e Realms getting a hair back more within continuity of the earlier editions and it being the opposite of it.
Part of Mystra's whole point is she can't permanently die. She dies, she gets reincarnated into a new form and her very identity is tied to the magic of the world. No Mystryl/Mystra, no Magic in Abeir-Toril.
For there to be magic in ANY form, Divine or Arcane, (other than the Shadow Weave, which has a steep price and is a secret of the Church of Shar), some vestige of Mystra had to survive. Part of the whole point of the Chosen was a contingency against her being annihilated, by putting divested shards of her divinity in as many separate vessels as possible to prevent the sort of anarchy of the Spellplague. One of my bigger complaints about the 4e Realms was the idea that Mystra was permanently dead but somehow Magic still existed.
So, it's looking like, in the long game, Mystra might be coming back in some form and Shar's "permanent" destruction of her only lasted a little over a century. A long time for mortals, but in the ~35 millennia history of Toril kind of a blip, like the chaos the world was in after the fall of Netheril.