Boy Chip, you sound like an idealist. I'd have thought that all of your experience with the Korean teaching staff would have broken you of that by now. There have always been some really good teachers on staff at DLI, but there have always been the handful of pains in the ass too, and they usually do a pretty good job of jerking things up for everybody else. Granted, I haven't been there for a long time, but unless the nature of Koreans has changed drastically, I doubt that much would have changed.
I do wish you luck though, and I hope that the smaller class sizes make a difference, even if you can't get all the team members to work towards a common goal.