I might get a lot of flak for this, especially since the only negative 'reviews' of this movie that I am aware of have been from folks on this forum, but I feel that this movie is better than Return of the Jedi for reasons. And stuff.
First off if this movie is a retread of ANH as many have claimed then ROTJ has sinned as equally, especially since it returned to both Tatooine and an actual Death Star. Here TFA has the advantage since it uses new locations and ups the stakes in many ways, including the loss of the Galactic Senate and Republic fleet in one strike.
But let's take the structure of the movies. ROTJ felt like 2 different movies with the Jabba's Palace rescue having no bearing on the rest of the movie. TFA is definately a cohesive whole with the characters growing and changing throughout and the narrative flowing more naturally. Revelations of character identity and relationships have build up and payoff and are even more emotionally charged than the tacked-on nature of Leia being Luke's sister and the clumsy way it was discussed by the characters.
The confrontations on protagonists and antagonist are at least on par emotionally with Luke vs Vader and the Emperor, and that's saying a lot. A LOT. The throne room scenes are the absolute best in ROTJ and tie up the main character's struggle with a definate conclusion, be it Luke or Anakin. The moral choices, the internal and external conflict, TFA has these in spades. A one time scoundrel and skeptic turns hero and father, confronts his son in a last ditch attempt to change his path, knowing that he is willing to sacrifice everything to get him back. This time it fails and it is tragic and heart breaking, not just for the audience but for the characters as well. And the fight between Ren and the heroes felt just as raw and emotionally charged as the final duel with Vader. The actors do a wonderful job with the incredible emotional heavy lifting that is asked of them. On this the movies are equal.
The battles are pretty uneven in ROTJ. The Battle at the Sarlaac was exciting because of Luke finally looking like a Jedi Knight taking out the bad guys with his sabre, and it was full of energy. But it was disappointing to see Lando, Chewie and Han bumbling around like the three stooges while Boba Fett had the most pitiful send off imaginable for such a hyped character. Leia straight up murders Jabba using her father's prefered method, don't know if this counts as a positive or not.
The speeder chase was exciting as well, but the ground battle of Endor is legendary it its unbelievability, as well as introducing Chewie's Tarzan yell. This ultimately distracts from the excellent space battle which is one of the best, if not the best space battle in all of cinema. With TFA we have many exciting battle sequences and chases with only the lack of a true space battle being the only negative. There's still two more movies left for that kind of thing, as well as rogue one.
Han Solo used is MUCH better in TFA than in ROTJ where he looked tired and ready to give up, with little sense of fun or accomplishment. He didn't even get to fly the falcon! TFA completed his story and served as the reminder that not all endings are happy. ROTJ missed this opportunity.
The funeral for Vader is ROTJ's most real moment, as Luke wordlessly honors his father while his friends and the Galaxy celebrate, it's so... Well it gets me in the feels every time. Anyone who has lost loved ones and mourns what might have been completely understands that moment. The silent Rey as she ascends he stairs to her destiny and then finally meeting the living legend and myth add flesh is a moment cut from the same cloth, though with very different emotions.
I hope you will see that, though no film is perfect, when it comes to Star Wars movies there are several elements that must come together to produce a whole greater than its parts. I feel ROTJ ultimately coasted to an ending that could have been far grander, yet still delivered the emotional gravitas in the end. TFA did a better job of getting us invested in the characters and keeping our intererst while serving up a heaping helping of nostalgia and comedy and the emotional conflict and impact that is needed to propel the saga into a new era instead of limping somewhat lamely to a finale.