I would probably take Zion over Embiid when considering things like health, age, Zion's potential upside.  I know Zion has dealt with injuries this year but NOP will be patient as he continues to develop and mature.  I don't see Embiid playing more than Zion over then next few years.  Zion's weaknesses are 3s, ft%, and assists.  His defensive numbers should come around if his numbers at Duke are any indications.  However, it is a tough decision when looking at your team build and with the dynasty format.  I love dynasty because it adds another element to consider.