Frankly, even though you've been to Burning Man, I don't feel you're competent to be suggesting improvements to the exodus traffic problem. You've been there once, and you came in and left on a fast-track bus which was able to bypass the entire process you're trying to critique. Had you been through it a few times and seen how traffic exodus works for people who are actually in the thick of it, I doubt you'd have bothered trying to micromanage the queues.
This is not an answer to the question posed in the article, which was, "Why wouldn't this work?"
I have an answer for why wouldn't this work. It takes about 60 minutes under ideal conditions to drive from a camp in BRC to the edge of the playa where you get on the little 2 lane highway. Packing times for an average carload of burners hitting the road is about 5 +- 3 hours. The ability of any group to predict when they can head out is highly variable given that they can really only choose when to start packing. Having 30 minute windows is a recipe for disaster. Nobody would hit their window. There would be disputes about what window we were currently in, etc. Practically, to anyone ever in exodus, this idea is patently absurd despite the solid mathematics. The problem is that the mathematically model used to do this analysis is woefully simplified from the actual complexities of exodus. Everyone ever been in exodus would know this. That's perhaps why burners keep suggesting you try it before trying to tell everyone else. There are perhaps 1000 burners who understand queueing theory better than this guy. Why do you think you understand something about the situations that we don't?
If you have ever been in the core of a major theme camp, you will recognize this situation instantly. Running a major theme camp is a huge undertaking with a 5 or 6 figure budget and a lot of complex engineering. Last year, our camp had 4000 amps of power distributed over 3 acres. There was a water system for processing several 1000 gallons of grey water, a full gourmet kitchen and facilities for 300 people. Every year some newbie comes up and tells us we are doing something wrong and we should do it differently. What they don't understand is that we tried their approach several years ago and it doesn't work for reasons that might not be so obvious. After awhile, it gets tiresome re-explaining the same things to different newbies each year and the crew starts getting jaded and starts just telling people if they don't like it, don't camp here anymore. Basically, this guy is getting the same response, just at a playa wide level.