As I have already said, the simple thing is that OOT release is just not profitable enough for them to care. While it might bring millions, that is still a change compared to billions they are making with other stuff.
This isn’t the reason at all.
George Lucas is … still … the reason why we don’t have an official OOT. Disney could give it to us any time they want, but they have obviously told us all to **** off and keep paying for their shit movies.