Sure thing, but just so you have a frame of reference, I've never studied architecture, design, city planning (does simcity 2000 count?), or the design process, so this is all from my gut feeling.
This is a prominent project. An addition to a Major US Cities Fine Arts museum should be considered a premier project that many different firms should want to work on. Without knowing how the process truly works (in Boston, I suspect it's laced with cash), I suspect there were hundreds of designs submitted for this. Again, please do correct me if I'm wrong on this assumption about the process. I'd like to understand it better.
So assuming a premier spot attracted the premier design firms, and this is the result, I think it provides an overall commentary on 1) the people choosing the design 2) the quality of designs submitted 3) the sheer lack of courage all involved in the process displayed, evidenced by the 3 bland boxes on huntington we are now stuck with and 4) what passes for good design in Boston.
Big projects should result in big ideas and big results.
This is a Big project resulting in a small idea and even smaller results. No one will make a trip to Boston to see this, other than those who donated to it.
Looking around town, other than a few examples in the horrid Kendall Square area that no one but scientists will notice or visit anyways, I'd say the MFA addition is a prime example of how little imagination is on display in this town's newer projects. Other examples would include all of the seaport, the new NU dorm, the new BU dorm, the Greenway debacle, and pretty much all of Kenmore's 'renewal'.
So I submit that the new MFA addition gives us a good look at what is lacking in this town: imagination and design.