The one that I bought, and returned, a month ago did not impress me. Since Vortex frequently brings out new models, I expect that any improvement to the glass will be in a new model, not an unstated improvement to the existing model.
FWIW, did not impress me doesn't mean it was terrible - if you're used to cheaper scopes it might seem great. It just wasn't as good as other scopes I've had in the $700-1000 price range, such as Bushnell Elite Tactical, Weaver Tactical, Burris XTR, Leupold Mark IV, and the Sightron SIII (which is absolutely amazingly good), etc.