After the GOUT was released Lucas seemed to have lightened up a lot on his whole, "only one version can exist" stance. He seemed to transition into a mindset in which he just had no interest in "wasting" his time and money doing something he had no desire to do. When the blu rays were released he even said in an interview that the reason the OOT wasn't restored was simply because the SE's needed to get priority because the restoration process was so time-consuming and expensive. I doubt he's too concerned anymore.

By the way, as terrible as the GOUT was, he did allow the OOT to be made available in a large-scale release on DVD. If he truly still wanted all copies of the OOT to deteriorate and be lost forever, he simply would not have released those bonus discs.