I get that, but I feel it would have been better for her character if instead of attempting to shoehorn the Skywalker name in there somehow by giving it to someone who isn?t a Skywalker, she came full circle and came to terms with the fact that she?s ?just Rey,? and is fine with that being her own identity. Her journey started out with her being sad about not knowing who she was and that her only name was Rey, so I feel it would have been fitting for her character that after her journey of finding out who her parents are and what her lineage is, she realized that she?s fine with being known as ?just Rey.? Like I said, I feel it also would have lent to Leia?s advice earlier in the film of not being afraid of who she is.
I?d also say Leia was more like a mother figure to her, not a father figure, being that she?s female.
The audience would know, yes. But anyone in the SW universe who actually cares who her lineage is, is pretty much all gone. So I feel she?s essentially back at square one with being known as just Rey and as I?ve mentioned, I just feel it would have been neat for her character that the very thing she started out being afraid of, she came to terms with.
I get it was a nice nod to the Skywalker brood, but it felt a bit shoehorned to me. Like you said, her true last name is a pretty big deal, so simply replacing it with a different last name isn?t going to change that anymore than not adopting a surname at all wouldn?t.