Thanks Didz
But yes i use that as well -
however the part that impressed me was the point he made that the PRESET formations (as in MTW) could be used by the AI

and that the "general personality" - a new trait?-
would influence the AI's choice of formations...

I know another modder already worked on AI placement variations -

and in another thread - or was it this one?-
it was discussed that multiple 'possible' AI "personalities" (scripts) would make the AI less predictable...

I think his suggestion was just a nicely elegant way to connect all those seemingly tangential discussions - using traits and an unfortunately forgotten feature.
( in other words not requiring some huge overhaul).