Roof closed because of potential rain, hard to forecast here because that shit just pops up sometimes
When it's open, it's a much better hitting park than it already is. Schilling used to request the roof be closed for his starts and when they rejected him at times, he'd whine...but this time of year is a bigger difference than the air flow in my opinion. It's dry, and while that seems cliché, this is the time of year that's the worst. Dry, chilly breeze in the evening, just a thin air. Summer comes and roof closes, fine, but this park is made for hitters and until mid May or until it's just fucking hot, I think the dry air is perfect for hitting.
Stadium can be manipulated with roof and panels around the outfield...the controlled environment is what I think concern many but the two teams in town this week plus the home team are capable all over the lineup.