I'm one of those going through the Combat 101 now. I shot at one Combat Shoot prior to the implementation of this program, but they asked everyone who wasn't already on their past shooting lists to attend. I think it's a good idea. Like Gzire said, it's about the organizers of the Combat Shoot and the other instructors and shooters being comfortable with how safe you are, your level of firearm handling skills, etc. I think as long as you are safe and take things slow, you will be fine. Firearms manipulations can be taught as long as you are safe. The series of three Combat Shooting 101 is basically a chance for the event organizers to observe how you shoot, operate with your firearms and associated gear and for the instructors to evaluate while they teach. While I felt that many of the material for the first day were very basic, I still picked up a number of things that will help me be a more proficient shooter.
Coincidentally I was at the Combat Shoot where the event organizers first thought to implement the 101 course. It was due to some VERY green shooters showing up, not really being familiar with their own firearms, not the proper gear for the COF, etc. Per the organizers, the Combat Shoot is intended for those who are already proficient in operating their own firearms in a static range setting and some of those people that showed up in that one shoot didn't even know how to really run their own firearms.