If they get 25hr/75rbi/260 average out of Cespedes they are a dangerous team.
They have plenty of starting pitching, and like BillyS said, if Diaz and Betances are their old self, that is a lockdown BP with Lugo.
Problem is that division is tough, Braves and Phillies will be solid, people overlook the Phillies, but Girardi will make a difference. I expect a hangover with the Nats, and losing Rendon will be tough.