Has the city been extra smoggy lately? I've seen a bunch of skyline shots with a heavy haze.
DZ, this is incredible work. I really need to get to Piers Park next time I'm in Boston. I've never been, but now it is a must-visit.
Try to get there before noon for optimal lighting. All views from Eastie, Winthrop, Revere, Nahant, etc are better in the morning. Views from the West such as Arlington, Waltham, Arboretum, and Larz Anderson Brookline are better in the late afternoon. I got to Lo Presti around 11 and Piers Park (about half a mile closer to the airport) around 11:30.