Now that's new to me. Granted, the sum total of my deco knowledge comes from SB, Deco for Divers, and a smattering of articles pointed out on SB. But I'm trying to learn more. I don't recall having seen "total dissolved gas" mentioned as a factor, only the concept of the leading compartment. So, for example, if you surface with a faster compartment that is 80% of the way to its M-value, then that is the (only?) one to be concerned about causing DCS, not another compartment that is 50% of the way to its M-value. Or so that has been my understanding. However, if this concept of total dissolved gas in the body is believed to be a factor in DCS, then I learned something.
In NEDU discussion post after post, the key factor has been that the total gas load on the deeper stop profile was larger than the shallower stop profile. Even if the deeper profile kept the divers further away from the m-values in the deeper portions of the ascent.
Its not really plausible, but imagine having all 16 compartments "full" of gas at the m-value vs only having one compartment "full" and the rest only "half-full". The former is (likely) a whole lot more stress on the body. The bubble showers that the faster compartments are releasing are going to combine with the showers from the "full" slower compartments and be more likely to produce clinical symptoms. Vs. if only one compartment is at the m-value the other "less-full" compartments are not as going to add as much and the overall stress is less.