If you do not have a monopoly, you can become a commodity. The 3+2+2 formula seems to be a simple method to determine how a firm may fit within the market it serves. It cannot really address the level of saturation (commoditization if I may pen the term) within that market. The difficulty in attaining and maintaining a 3+2+2 rating would be proportional to the competitive level within the market served.
Regards,