This season has taught a few things: Denard Span is a valuable ballplayer; Tanner Roark can pitch; the Nats probably don't need to get a 1-year 4th starter for $10-15 million with Taylor Jordan returning; Ryan Z might have recovered his throwing; Wilson Ramos can hit; Werth is certainly worth it; the Nats suffer when Harper is hurt; Rendon can hit in the majors and can play a decent 2B; Espinosa can't hit or is too stubborn to learn to hit within his ability; Jordan Zimm is the ace of the staff.
Just for starters.