You could then increase conservatism through gradient factors. And furthermore, take bubble mechanics into account to make even more conservative. Isn't that what RGBM tries to do? And it just so happens that is what Suunto uses.
A teacher of mine told me that you'll go to University and when you think you know everything they'll give you a Bachelors Degree. Then you keep on the studies and find out there's a lot that you really don't know. At that point, they give you a Masters. You keep on studying and realize you know nothing. And then finally when you come to that realization, they'll give you your PhD.
Conservatism is your friend. Diving only within the computer's NDL is not necessarily being more conservative than doing well structured deco dives. You can do very conservative deco dives for the sake of extending times underwater within recreational depths and recreational overall run times.
I am not sure what you are saying here, but I don't think this is the place to get into complications of deco theory. I will therefore not give a real substantial reply. I suggest playing around in the Ask Dr. Decompression forum.
I am not sure what most Suuntos actually do. They have said they use "Suunto RGBM," whatever that is. (The term RGBM was introduced by Bruce Weinke, but his name was not real prominent in the descriptions you got with the computers.) A lot of people think the traditional "Suunto RGBM" algorithm does not seem to follow Weinke all tahat much. Recently, a couple of us saw the description of a new computer Suunto released last year, and the wording appeared to be different. For one, Weinke's name was all over the place, which indicates that he might have more ownership in this model than the last one. I don't know.
When you start using decompression software designed by Weinke (GAP), it is not the same thing.