Yeah, the loads only tell so much, but it still is interesting to see how remarkably full many of these markets ran. Also it would seem that often the lowest-load markets are among those scrapped. But it's certainly true that fare and traffic composition can make all the difference.
I also found the enplanements interesting -- I'd never have guessed MSP was #4 in the network, but it's a combination of being one of the largest Denver markets and some links to other focus cities. St Louis doesn't quite crack the top 20 in spite of several destinations because of so few Denver flights. (Note that these are only domestic enplanements, FYI.)