Wrendog brings up an interesting point, so I got to Google Maps to measure out the distances. If the new design of the pickup/drop-off areas are really about as long as a SLC block, that means they are ~700 feet in lenght. Each, because they are on separate levels.
Then I measured the length of the pickup/drop-off area at the existing airport, and found that it was ~1350 feet in length. Subtract out the area of crosswalks and inefficient curvatures, and it will be even less.
So the new airport will have more space for cars than the existing. That isn't saying much, but there it is.
Then I started comparing that measurement with other airports in the area (Denver, Phoenix, etc) and pretty well came to the same conclusion as Wrendog. 700 feet each for pickup/drop-off is pretty sub-standard.
The good news is that it looks like the P/d areas can be extended in the future, based off renderings like this one:
Or, if all else fails, just take TRAX. Then it won't matter how crowded the P/d areas are!