I spoke to the other 'tech' at Motul USA today, not Joey (forgot his name).
He reiterated that the results they get out of the new Ester Cores (and the reasons they can reduce the add packs considerably), is because of the new ester based AW package.
He also said that they CAN BE mixed with ANY other oil/base stock, with NO ill effects/harm, BUT with the disclaimer that one will not get the full benefits/gains (7% more hp out of the Trophy 0W-40??!!) the more they are diluted/mixed (just like EVERY other synthetic oil out there boutique, or off the shelf
).
When pressed, he admitted that the reason for the reduction in both the TBN, AND VI is due to using a good deal less Ca and Mg in the addpack (he did not know about the moly and boron), and to not adding any extra VII polymers to the mix, since they wanted this formulation to be much more of a pure race oil, and much less of a 'streetable', long(er) drain oil like the previous diester 300V was.
Part of the theory is (as much as CATERHAM, and others will HARSHLY disapprove of/disagree with this); less stuff in there to mix/dilute the lubricating properties, and anti-wear/friction functions.
This^^ is also the theory/mindset behind the MPT 30K oils, at least for the VI part, since they have sky-high Ca (and I think, Mg) levels to get their high TBNs for LONG drain capabilities.
They don't make any claims for these to be pure racing oils, although one could use them for such in <8000 rpm redline, non-'screamer' engines, I suspect.