Alright let me rephrase studio interference from meddling to pressure and see if we agree, in the same way that the studio put JJ under pressure in the first place with TFA to produce a script in 9 months after dropping Arndt (paraphrasing), JJ and co. were put under a similar level of pressure after Trevorrow was dropped along with his treatment, it’s a time crunch but also a creative decision. Not so much in the stereotypical way of taking some JJ master cut and unknown corporate hands chopping it to bits, but to your point JJ himself played ball in the mucking. Still it doesn’t take total conjecture to say looking at Disney’s track record you’ll find a fairly consistent hands-on approach. You can feel last minute changes in the movie just by watching it which I don’t find as consistent with JJ despite other films he’s made with arguably poor execution. Someone could possibly do a deep dive and piece together what happened behind the scenes and see where the ratio of blame lands, but probably nothing comprehensive for a few years, everyone involved keeping their cards close to the vest.