Still why all the extra work? This inhibits the game flow by constant tracking of other continuous stats...
That's one of my issues with some changes people want to make to Rolemaster. I like the increased detail as compared to other systems, but there is a point at which degrees of detail simply create more paperwork and tracking without actually contributing to the game in an overall beneficial way.
For example, let's take some of the talk about critical hit charts if we applied them to RM. Some people feel that making the criticals truly random, so that even a specific roll on a specific chart would vary, would increase the 'fun'. But, for me, if you have enough variety in the charts as they are already, in the bigger picture all you're doing is causing more dice to be rolled and results to be calculated and looked up. Which, for me, isn't fun. I know I say it all the time... but Fun > Balance > Realism