If you did not get a guaranteed Boardwalk view room, but really like that area of the resort, ask for a view of the Village Green. Those rooms are considered Preferred - Pool/Garden View.
The Village Green is the lawn between the BWI/BWV lobby and the boat dock. Rooms are on the floors above the Wyland Gallery and the "arch/walkway" that goes past the arcade to the main pool. Rooms in this area have partial views of the Boardwalk and views of the higher fireworks from Illuminations.
Best wishes -
P.S. We all need to keep in mind that view requests are not guaranteed.