Yes, i think this is an important strategy decision to prevail in tomorrow's Warfighting. The reason modularity has started to become critical, is because it allows for mass production at a scale for a cost that were not possible otherwise.
Up until now western air forces (and armed force in general) were kind of operating on the assumption that, if you pack so much technology into a single platform it will be highly survivable and won’t face attrition due to its qualitative edge. But this notion has come more and more under Challenge. It is increasingly clear that Technology cannot replace the mass.
Now even USAF has started to recognise, given the trends in technology development, in next 10-15 years in a full scale peer to peer conflict it could loose its highly touted 5th JSF at an unacceptable rate. Thus, the strategy is to layer its expensive 5th and 6th gen assets with (relatively) cheaply mass produced UAV/UCAVs not only to be a force multiplier, but also to be expandable and take on the attrition.