I'm no marketing expert, so when I read that our highly regarded sports architecture firm, HOK Sport Venue Event, changed its name to Populous, I was confused. Why ditch a well-known name for one that sounds like a pharmaceutical-grade acne medication?The name change was necessary after the local firm's management bought itself out from under St. Louis-based HOK Group at the end of 2008. A source at HOK Sport told me yesterday that the split happened because the KC office, with its focus on s