The sudden fetishism of spires on this board has been really bothering me lately, but what is driving me crazy is the discussion on this thread. The aesthetics of the exterior of a building is not all that matters. Instead of asking "does this building look better without the cantilevers?," which is a totally subjective question, we should be asking "why did the architect feel cantilevers were necessary in this design?" I can guarantee you that the architect has already considered all of these variations people are Photoshopping and posting. If you go back to the BCDC presentation, they basically spell out the reason for these "lower cuts" on page 5, and it all seems to boil down to that the architect believes that the value added in a large, calm, sunlight filled, exterior amenity space is greater than the loss of interior rental space. The cantilevers help to further confuse the wind, allow light to penetrate to the terrace, and allow room for many more exterior uses. All of this, plus the added public realm advantages in less wind, more light, and a building shape not seen in Boston allow the developer to claim positives for the city, which means it is more likely to make it through the review process. Also, in all likelihood these lower cuts will let the developer charge more per sq.ft. for the rent-able space inside because of the outdoor amenities. The options posted above, while likely adding more space to the tower, would probably lower the income available to the developer, as well as generally make the building and the corner it is on less pleasant to be at by adding wind, increasing shadows, and removing private and public amenities.
Ask questions and think about why something is done. Don't just assume that you have a better aesthetic sense than someone else.