Just don't eliminate the grand staircase(although it's purpose to lead to the north bridge has been fulfilled), instead, bring the entrance of the East/West connector directly into the garden, and THEN add retail space(I'm not all for the fact that the entrance will be outside and if it's raining, I have to make a mad dash). Besides, you'll have tons of retail across the street in a couple of years.
Don't they have places where people can propose ideas?