I think people see some of the impact players in their early 20s are having around the majors and hoping we have another one when it comes to Robles, but, unless he dominates AA, there's little reason to push. I suspect the team would think about it in the 2d half of 2018 if both Goodwin and Taylor fall back to earth or are traded.
Don't forget, Goodwin was a 1st rounder and was supposed to be JBJr.'s replacement at South Carolina before the Nats drafted him out of JuCo. He's just now growing into some power, some speed, pretty good walk rates, acceptable K rates in the high minors, and should not be a defensive liability in a corner OF spot. I would not expect him to be much more than an average OF, but it takes a guy walking in at above-average levels to push him aside on a contender.