Very nice, that is almost exactly how I paint mine.
One thing I find which helps before doing the flags, bayonets and other highlights is a dark brown inkwash. The Irregular 2mm stuff seems to really take ink well and it makes the details pop even more.
"Mistakes in the initial deployment cannot be rectified" - Helmuth von Moltke
I agree – a good ‘primer’ (pun intended….) on how to paint up the teeniest of tiny figures……. As you describe, a broad approach for the uniform colours, allied with use of flesh for faces and hands, really make the minis stand out.
I do worry about the use of washes and inks, though, as often they can seem to ‘drown’ something this small….. have to be sparing in using them – often the dark undercoat, visible between the figures on a block, does a good enough job of appearing to give visual depth or shading…..
the only thing I would add might be a bit of variation in headgear colours to provide more lived-in, ragged look to the units in the ACW in particular….. A few variations of brown amongst the hats.
Another good guide I came across recently on the web: