"Just...images, really. Feelings. She was very beautiful. Kind, but...sad. Why are you asking me all this?" Are these the "sparkling details" you refer to?
Keep in mind, also, that Yoda and Palpatine, arguably far stronger in the Force than Luke, missed crucial details of the future. Vader, born of the Force, didn't notice his daughter right in front of him
TWICE, and almost shot down his own son!
You expect far more of Force use than it has ever observed to be used in the films.
"Even if they were feelings, the term memory implies that they're not recurring hallucinations of some beautiful woman she can't identify,"First of all, what do
you know about force visions? Considering wht you call "sparkling details", any other conclusions you might come up with about the implication of certain terms are suspect. She calls them "memories" because that's what they seem like to her. Immediately after this, she states
"You have a power I--I don't understand and could never have." ...so why on earth would she call them anything other than what they appear to be to her? You are completely ignore her frame of reference here.
We, the audience, know they are Force visions. She does not.
"She wouldn't even know who that woman was unless Padme could talk to leia."
Sigh.....
LUKE: Leia! Leia's my sister.
BEN: Your insight serves you well.
LUKE: Yes. It's you Leia.
LEIA: I know. Somehow...I've always known.