I think LCP should be trunk though. It is the most important secondary state route in  Loudoun County, even though there are roads like VA 7(part motorway), VA 28 and 267(both motorways), and US 50(John Mosby Highway) but LCP has more importance than roads like SR 621(evergreen mills), SR 659(belmont ridge), and even SR 606(Old Ox) even though that one might be controversial. LCP doesn't isn't close to being as parallel as US 29(Lee Highway) with I-66 for VA 28, but I do get your point. Still think this should be trunk even though it isn't as important as FCP or PWP