Before the park opened, I was firmly in the camp that didn't want general access to the Celestial land without a park ticket for evenings, or any time. But after seeing how the overall park operates, especially with its very extreme capacity/operations issues, and a capacity solution many years away, I've changed my mind. Celestial is very much being underutilized. The present restaurants, and the unopened planned ones, will not be able to achieve their optimum operations until this area accommodates more traffic. Money (profit) is being left on the table. Profit that can be used to 'complete' Epic with the three new D/E ticket high capacity attractions it sorely needs. Celestial is beautiful, and has a lot to offer with its fountains and gardens and restaurants. At this point in time it's rarely crowded.
So, it behooves Universal to open this area, at some time of the day or night, to the general public and/or AP's. I'm on record as saying I wouldn't visit Epic much until the park is complete, which it is far from . But, 'If' Universal opened Celestial to guests after 5:00 PM (as an example), I'd actually bus over there from the North Campus often to enjoy the beauty, ambiance and restaurants of Celestial. Presently Celestial is not what it was expected to be crowd wise. May as well let it prosper while the rest of Epic grows out, which will take at least four/five/six years worth of expansions.
Epic's guests often leave early, so that opens up parking spots, plus almost all of the North Campus on site hotel guests use the complimentary busses, not their cars.