Yeah, Burbin, I suppose I see the use in including it earlier rather than later. But I don’t think any of that is strictly “necessary,” you know? Like, Palpatine not trusting Kylo is made apparent at the end (and, I think, works better if it’s not spoiled beforehand), and Rey not being a Jedi is spelled out elsewhere.
I don’t undermine the idea or it’s excecution, I just think when weighing either option keeping the Palpatine/Kylo interaction is more significant to the plot and characters than explaining how Kylo got to Endor, specially since as it’s been pointed out Kylo had access to the dagger and was in cahoots with Palpatine so it’s not really a hole that needs to be filled.
As for Palpatine’s relation to Kylo, I prefer it to be as separate as possible from the Master/apprentice dynamic Kylo just got away from in the last movie, it’s much more interesting to have it so that neither really trust each other (and for good reason) but they need one another. Palpatine needs Kylo’s help to end the Jedi and restore the Sith, Kylo needs Palpatine’s fleet to turn the First Order into “a true empire” and extinguish the flames of rebelion. He has to pretend to go along with Palpatine’s plans to avoid having him and his fleet turn against him, he basically has a gun to his head, so he goes to hunt Rey down as instructed while secretly planning to recruit her to take down Palpatine.
I think that’s a way better motivation for Kylo than the one in the original film, and the changes done so far have really helped push things in that angle, those include Palpatine threatening Kylo early in the film (first with the spirit transfer, and later with his fleet) so we see they’re not really on the best of terms.