I don’t know if we can say “beyond what JJ intended” since Abrams didn’t intend anything beyond The Force Awakens. He scrapped all plans, and was reading Johnson’s script while filming.
He should have either made Luke a full character in his film, or not included the scene on Ahch-To. Abrams chose to make his film a trailer, locking Johnson into writing a film that took place immediately after, unlike every other film in the franchise.
Well, no matter what, he clearly didn’t intend for Luke to be a grumpy old man who wants the Jedi to end. The final scene portrays him much more dramatically and mystically for JJ to even consider doing that. Even though he removed the rocks floating everywhere in order to maintain continuity with Rian’s script, The two directors’ visions were clearly at odds.