As far as I can tell, the building, if built as the pic shows, will be clean and handsome for the area. Building around the vent building at this point my interfere with its purpose, to bring clean air into the tunnel, inasmuch as the intake vents appear to be along the side of the building. Unlike the vent building on Atlantic Ave, around which was built the hotel/condo, the South Boston vent building was not designed to be encased within a concealing structure.
I think, however, the vent building, though huge, will fade into the background of the entire district once it is fully built up. It may come to be appreciated as a kind of urban sculpture.
I too would like to see bold and innovative architecture throughout the seaport district. A percentage of the new development, however, will need to be made up of "background" buildings, designed to set off other, architecturally innovative, buildings. Otherwise, an urban area could become a mish-mash of bold stand-outs that don't relate appropriately to each other and blend into a cohesive whole. Imagine if Manhattan were filled exclusively with buildings like the ATT or Chrysler buildings. In fact, Rockefeller Center is a good example of subtle "background" architecture successfully blending, yet standing out as brilliant urban design, due to the placement of the individual buildings, pedestrian plaza, and ground floor mixed use space.