The problem is that you have to rely on assumptions in order to come up with all of that.
For the “processing power” explanation sure, but for the pure power explanation it’s a straightforward inference from watching the movie. Kylo says to Rey “the strain would kill you,” but Snoke is clearly shown to be far stronger than Rey in their throne room encounter, and when Snoke explains in that scene that he’s been in Kylo’s mind for some time, that’s a payoff/callback to what Luke said about the night he read Ben’s thoughts, so there’s a really easy implicit answer in that Snoke is strong enough to do the thing Rey can’t and has the connection to Kylo needed to do it. The only way it becomes a “problem” is if, when Luke dies, the angry fan boy in the audience says “but Snoke couldn’t possibly be stronger than Luke,” and that is a baseless assumption.
This way, the audience doesn’t wonder how Snoke was powerful enough to pull off such a feat
This is not a problem with the movie itself. The audience doesn’t need to know how Snoke was powerful enough. It is implied in TFA and earlier in TLJ that Snoke is powerful simply as an established fact about his character, and so the reveal that he was the one doing the thing that only a very powerful person could do is a logical conclusion to the mystery.
The only thing the audience is wondering is how Kylo and Rey are able to communicate across the galaxy
Ending TLJ with no explanation for this mysterious phenomenon that the characters themselves call attention to as a mystery is a far bigger problem, as it leaves TLJ’s own story unfinished. It’s especially bad since TROS doesn’t actually answer the question; at no point in TROS is it explained how Kylo and Rey became linked, they just pointlessly and confusingly give the phenomenon a proper noun.
Ultimately I think the dyad is so poorly explained and frankly unimportant of a concept in TROS, and the mind-link in TLJ works well enough on its own, that editing TROS to fit in with TLJ makes far more sense than editing TLJ to fit with TROS, if the edit is even really necessary.