Lovely depiction of "wagged, wascally webels".
FWIW, good choice not to depict them as militia as I doubt that militia - or State troops, for that matter - would ever have looked like bad. Militia did tend to turn up foe longer periods of service, typically 3-6 months, in their "working clothes", but these would have been kept in good repair and they were never in the field long enough to end up looking like that, no matter what time of year (State troops would generally have been issued some sort of uniform, but would mainly spend their time in garrison, and have endured nothing like the hard campaigning of the Continentals).
The Continentals, on the other hand, would have been out in all weathers for the duration of the "campaign season"; re-issue of lost/damaged items was virtually unheard of, and the next year's uniform would invariably have been late - in fact, more of them wearing items of their own civilian clothing to make up for the bits that either weren't issued, or simply didn't arrive (usually small clothes [waistcoat/breeches] and trousers/overalls - hats and coats tended to be the most commonly provided items), would give them even greater accuracy!