I don't think SMT does nothing else than read the BMS. Full pack when new is simply a number that has been set when loaded. If the voltage of the cell has been changed, as it appears, the actual nominal will reflect the change.I would have a question : How can it be possible that value of "nominal full pack" is higher than "full pack when new". I was thinking that it was the contrary.
And it's hard to understand too, fluctuations of value of battery degradation. Of course we have a different constant, it seems that SMT adjust some values of parameters by calculation and not reading.
Same it does apply to "degradation" which is not an actual degradation measurement, but a comparison btw actual and rated (full pack when new) capacity: the sense of a negative degradation is in these terms.