I don't really see a window closing. Vladdy isn't a superstar. He had 1 WAR and .789 OPs last year, we made the playoffs in spite of him, not because of him. Bo will hurt more to lose I feel, and it's not like there's a 0% chance we bring him back. The model the team is working with seems to be working, we just need some good luck in the playoffs, instead of bad.