Those of us who think Span is better defensively would probably all agree that we would lose little by replacing him with Taylor. Defensively, that is. Offensively, Taylor doesn't come close to compensating for a loss of Span. And losing Span leaves a big hole at leadoff. Taylor certainly is not a leadoff batter.
Definitely has some improving to do a the plate. I doubt he ends up being a leadoff hitter especially if Trea Turner pans out.