Well since you asked; actually, I am a newbie to CAS and have neither shot in an event nor attended a complete event yet. So, anything I know about CAS is strictly based on what I have read on the various forums.
I would like to see a class that does not require two handguns; from what I have read it seems that all classes do require two handguns. I think the two handgun vision is one that is the product of the western movies of the 30's and 40's. I find this requirement to be out of touch with the typical working cowboy of the old west. Almost none of them carried two handguns at the same time, and of those did, their second gun was usually a small one; what we call a "pocket gun" today. The picture of someone with matching handguns just wouldn't have fit the needs and the budget of most of those cowboys.
Perhaps this issue has been thoroughly discussed years ago in CAS and there were what seemed to be valid reasons for the requirement. I think it more correct however to realize that the typical cowboy had six shots in his handgun and then had to reload. And while I don't think this is the purpose of the rule, I am sure that the requirement of two handguns discourages some folks from joining in the fun.
Just my two cents,
John