For instance, the worst part of TFA (in my opinion) is the inclusion of Starkiller Base, not simply because it is a repeat of the Death Star, but because it is only really in the film to repeat the Death Star, and thus feels inorganic to the rest of the story - whereas other repeated elements fit far better and serve a more justifiable purpose in this narrative and actually work in the film’s favor.
Absolutely agree. The only purpose Star Killer Base serves is a big, flashy battle sequence at the end of the movie, which is a piss poor justification for its existence.
The original Death Star battle works well because it is a defining moment for the main protagonist. It brings Luke’s character arc to completion. The Return of the Jedi Death Star battle works not as well because the fighters are ancillary characters whom the story is not about, but is still symbolic of the Rebellion’s decisive and final victory against the Empire. The Star Killer battle has neither of these things and has almost no reason to exist and honestly the movie could be just as effective without it.
The only other thing it accomplishes is destroying the New Republic, which is a pretty secondary plot point in that film and is really only important in regards to the macro level stakes for the trilogy as a whole.