The cut was due to the FAA. But going all-residential with mostly rentals makes this a much more viable project. It's in the middle of the Financial District, and I'm imagining the main resident base is 26-year-old overworked lawyers as well as crash pads for overworked 50-year-old lawyers and managers.
They even have some above-grade parking, hidden behind living units on six of the podium levels. That's a cost-saver. I suspect the parking ratio of 873 spaces per 1,090 units is just the maximum they might want, and it would make sense to cut some of it. The land use permit process makes it easy to cut parking, particularly if it's below-grade as most of it would be. Seattle typically has a parking space for each condo and a ratio like 0.5 or 0.6 for a typical highrise rental, but this one will be a closer walk to work for a lot of people.
Have fun with the land use permit drawings if you like.
http://web6.seattle.gov/dpd/edms/Get...spx?id=8613111