As I've noted previously, talking about music isn't as useful as listening to it when you want to convey certain concepts. The same applies to dancing. In fact I think one of the reasons that the so called "style wars" broke out on various Lindy Hop discussion boards was because people couldn't understand what everyone else was trying say, and what was said was usually worded very poorly. One of the reasons why people come into conflict is because of poor or a complete lack of communication.
If dance is a form of communication, then I think one of the least understood concepts, at least in the realm of Lindy Hop, is that of "clarity of communication" or simply the ability to be articulate. Beginners (and some veterans) tend to get caught up in the need to learn a variety of moves or patterns. I sometimes teach at a small dance studio, and I once overheard a great line from a hip hop teacher at the end of one of his classes while talking to one of his students. The kid was badgering him about learning new moves, and the teacher simply replied, "You don't need more moves, you need more movement!"