This is a style that can be turned around rather quickly while still getting the job done.
In a lot of ways, minimally rendered forms can be the strongest statement. Often, when the large tones of a composition are worked out early on, this is when the image can have it's greatest impact. The areas of contrast are the simplest, and the visual statement carries in smaller sizes or from a distance.
Meticulous rendering and excessive detail is often what impresses the "art fan", but for readability and communication of an idea, I prefer a fresher, "less-worked" solution.