Fortunately for us these rules include both an Order of Battle and a Map for Edgehill (as well as OBs and maps for a number of other sizable ECW battles and one TYW battle).
Again, for us the nicest thing is that these rules far smaller units than we have been painting. Thus, each of our normal pike & shot units of six stands can easily be broken down into two three-stand units; and our six stand cavalry units into three two-stand units.
However we suspect that "For God King and Country" will not work as well for smaller actions . . . so for those we will simply re-combine our fractured units back into six-stand units and use a different set of rules.
But the real advantage right now is that I need to paint a lot fewer figures in order to have enough cavalry to play.