Just thinking out loud here. The only problem I have with the dyad this is that without any explanation I am left to assume it’s basically what we’ve seen and heard about Kylo Ren and Rey’s connection from the previous two movies.
“There’s been an awakening… the dark side, and the light.”
“Darkness rises, and light to meet it. I warned my young apprentice that as he grew stronger his equal in the light wound rise.”
And especially given that we’re effectively told that for all practical purposes Snoke really does equal Palpatine, it seems baffling that the former is totally unfazed by this but for Palpatine it is an unforeseen (and hugely lucky) surprise.
It’s like “well yeah they’re a dyad. Snoke’s been saying that since the 2014 Thanksgiving TFA teaser trailer.” It’d be different if perhaps he reacted with “wow since dyads are so rare I didn’t know they could do THIS! AHAHAAHAHAHAHAHA”
It’s just so silly! Other than that single, dumb moment it’d be easy to fix. Just lop off part of Kylo’s sentence. “My mother was the daughter of Vader, your father was the son of the Emperor. [What Palpatine doesn’t know is] we’re a dyad in the Force, Rey. Two that are one.”
How would it go to just lop off the only other mention of it?
“Stand together, die together!” (Gonna kill these fools) “Ack. The life force of your bond… [A dyad in the Force]. A power like life itself, unseen for generations.”
It’d be a little destructive, but ya wish it could work this way. Now I understand why they employ the story group full time, to spin this stuff to make sense.