Just How Much Parking Does Grand Center Need?

The St. Louis Beacon recently put together a dazzling info-graphic depicting parking in Grand Center. Seriously, it's really good. The graphic shows the location and number of all parking in the area in a very clear way. In fact it's so good that it obfuscates the question that should be asked: How much parking does Grand Center need? Is 4,200 parking spots a ridiculous amount for half a dozen performance venues, just two of which account for 7,000+ seats?