This offseason will be crucial for them. span, Desmond, Zimmermann, and Fister all free agents. They have tons for pitching depth but losing Zimm would be huge. Taylor/Turner likely replace Span/Desmond. They should have Harper and Rendon for the next couple years.
I don't think Taylor is anything special. Turner could be, but it may take him a little while. But either way, their lineup will at least be dangerous with Harper and Rendon, if Rendon can stay healthy.