I imagine the vehicles for such figures would carry the equivalent detail, so the current crop of CC Interwar vehicles would not be part of the range. Likewise they would be of no use to the '28mm Interwar gamer' in much the same way as 25mm or 1/48th ones would not be... nor are they meant to be. They would be in and of their own thing.
There are a number of sets of rules, ranging from the 'Kriegspiel' ones at the back of
Little Wars, or the ones in
Charge! to more recent offerings.
Nostalgia probably, but no pressure to churn out miniature masterpieces either, nor to play with all but the simplest rule sets.