I've talked this over with Shad before, and the main issue is being unable to be everywhere at once, plus how quickly your work can be undone once you're no longer actively fighting. The idea behind using SCNMs is that the items dropped from the NMs remove stats from the beastman army and give them to the nation. For example, a Brass Letterbox from Bres, when turned in to Kevan, will reduce the resources of the Quadav and increase the resources of Bastok. In addition, campaign battles in a nation's city are said to drain the stats of that nation... and it is assumed the same goes for the beastmen. Furthermore, we believe that simply fighting the beastmen armies in their stronghold, doing the SCNM battles themselves, as well as the campaign ops to fight the beastmen leaders may also damage the stats of the the beastmen army.

Using campaign ops to increase the nation stats has also been considered, especially for the troop training ops which seem to increase a stat all their own that the intelligence NPCs don't talk about (Considering doing the healer training is the ONLY way to make them more effective). However, with a limited group campaign ops can only do so much.

It's our belief that doing this would enable the NPCs to pull their weight in battle, so they may win battles on their own... or at the very least that they wouldn't lose battles so swiftly.