One of the truly refreshing things about helicopters in general, is that rules do not cover every situation. Experience and judgement are (and have to be) used on a daily basis, and for the most part, they are used pretty wisely.
Rules are guidance, and anyone who thinks they can write rules to cover every situation is a fool of the first magnitude.
Limitations are another matter, and have slightly less latitude for interpretation, but as this example has shown, may have some room for intelligent exceedence on a very limited basis.
This discussion is one example, and should be used in lots of crewrooms and flight schools to discuss what goes into good decision making.
I often wondered at the mentality of senior military officers who would condone airshow displays of their helicopters which broke at least 5 limitations, and then try to court martial someone who made a decision in a time of some stress without assistance from higher authority...