The SK14 is a really neat little skiff, and despite my comment about marginal utility, it would be hard for me to justify building a solo skiff since I already have a kayak. I like the flats boats, and despite their limited scope of operation I'd consider one, but it would be a a 17 footer or so that can fish 2 adults.
Also, with where I live, getting to the real flats means crossing the bay or trailering out to a further launch, and with a true flats boat it'd be the latter.