If the average movie-goer has questions, then sure, all they have to do is re-watch the prequels! That isn’t a bad thing. I’m sure if people had questions coming out of the movie they would have looked it up and an article would have filled them in immediately and found a satisfactory answer. And besides, this edit will (likely) never leave the confines of this forum, so it’s not like we genuinely have to consider a large demographic, just the most hardcore of fans.
If you ask me, Palpatine having a son we never knew about is way more loaded than Palpatine influencing the Force into creating a birth without a father. People should know that about Anakin’s character from Episode 1. Maybe we could weave the fatherless-birth part back into the draft so it rings more bells.
Remember, this is the final twist/reveal of the Skywalker saga. Not of the Rey saga. Or, as people rightly call it now, the Palpatine saga. This is the only way to make everything right. I’m convinced of it.