One development scenario for Kendall Square, featuring 2000 units of housing, three million square feet of retail, and 250,000 square feet of ground-floor retail. This slide was presented at yesterday’s committee meeting, under the title “preferred development scenario.” Some committee members disagreed — “preferred by whom?” asked Barbara Broussard, of the East Cambridge Planning Team, who suggested that the office buildings looked too much like “wedding cakes,” with their layers of decreasing size as they grew.