If Desmond can't learn second base, and we have two ostensibly major-league quality shortstops, the logical solution is to trade the one we don't want! It's a luxury the Nats haven't really had yet in their brief existence (except maybe with the bullpen this year) but it is what good teams with depth do when they have a surplus of starting players at one position.
Yes but then we have a hole at second again that this team simply hasn't filled since Vidro became a problem. Suddenly the hole is filled with an average to above average player. Why create a hole when you don't have to?