The 6.0 system is adequate for DWTS, because DWTS is a bogus competition. Most people watch it just for the fun of seeing the celebrities. There are no criteria to speak of, the "judges" are not trained and they can give the couples whatever mark they like. Half of the competitors have started skating only about a month ago at the tender age of 35. The routines are practiced for all of one week. A judging system that is adequate for this kind of show is not necessarily the perfect system for a complex sport like figure skating. These are two completely different things.