I agree.
The line you take while drifting is important. In fact, the line you follow should be on purpose. It shouldn't be I'll just throw out my car rear end and wherever my car goes is where it goes. Following a planned line shows understanding of the car and the ability to control the car.
I haven't looked into the whole judging thing or drifting competition as drifting to me is just more of a hobby, a natural progression of my driving ability, not for sport. I can't really comment specifically on Irwindale or what happened there.
However, from what I've personally done and how I have shaped my own idea of drifting and what good drifting is, the line or the ability to follow a line is of the utmost importance. Many people can slide a car or throw the rear end out and drift to some extent, but few have the true ability to control and modify their car during a drift. One should be able to progress to the point where they can essentially drive the car as they would if they were grip driving or driving to work. You should be able to turn, accelerate, and slow down while in mid-drift. You should be able to slow down and tighten your turn or speed up and widen your turn. You should even be able to speed up or slow down maintaining the same turn radius or adjust your turn radius at a constant speed...all to the extent capable by the laws of physics and the car's physical limitations. In my mind, the ability to do the above things while drifting is the ultimate achievement. The ability to control the car as if we were driving normally should be the gold ring we all should be reaching for.
To me, drifting isn't show, it's purpose. There's no who made the most tire smoke, who had the highest angle, who held their drift the longest, etc... but rather who drifted the most accurately and appropriately for the given corner. Yes, even in this there is time for tire smoke and l . . . o . . . n . . . g drifts, but when you go around that corner, the path taken better specific, deliberate, and controlled. If you have the choice, pick what you want. If the judges had the choice of your line, I guess you follow it the best you can. If the control is there, there is no issue.
--- my 2 cents anyways

---