That's a good idea. It'll remove the 'box-ness' from the map.
As for the sections, I think we should use the following sections (using traditional instrumentation):
Flutes: 3 (Piccolo, Flute I, Flute II)
Double Reeds: 6 (Oboe I, Oboe II, English Horn, Bassoon I, Bassoon II, Double Bassoon ...