Actually, Matrix separated from Linda a year or two before the end of the PAD series and Linda stopped being an Earth born angel when they separated, so at most Linda is girl-who-used-to-be-merged-with-protoplasmic-Lana-Lang-and-once-was-an-Earth-born-angel. Yes she has a convoluted backstory but no one bothers to mention that Superman used to be a blue energy being or that Spider-Woman was once evolved from a spider, so I don't see why Linda's out-of-date convoluted backstory should hold her back any more than any other superhero's.