IMO the biggest problem with removing Padme’s death is how, if you watch it in chronological order, it doesn’t work. We’re left with Padme being alive and then she isn’t addressed for two whole films before it’s just unceremoniously said she died.
This lucas’s fault in the end leia having memories of padme is a plot hole that didn’t have to be. I know what he originally was going for before he decided to have padme die giving birth to Luke and leia. it was for Luke to be the one that gets to the know the father he never knew and leia to know the their mother each know one of their parents but revenge of the sith ruins that.