[sentinel]

1.) Well, the tower is nearly complete so not sure what you think can be done at this point.

2.) While I understand your concerns about protecting the historic nature along south Michigan Ave, I think there are always opportunities to blend historic architecture with new projects, which is very common in older European cities. Many cities such as Vienna, Munich, London, Paris, Milan, etc, have similar mixing of old and new styles.

3.) Chicago architecture is not just defined by 'boxy' structures as you describe them. There are many buildings from the early 20th century in Chicago and even in the mid-20th century during the height of the International style that defied that trend and became iconic for their lack of 'boxiness' (Marina City, River City condos, the old Prentiss hospital...or maybe it was just projects Bertrand Goldberg?).
Any global city like Chicago, that has a rich and varied architectural city can and should have a variety of design forms.