In healing these lepers Jesus doesn't absolve them of their religious duty, he commands them to fulfill it: Go, show yourselves to the priests.
What is interesting is that nine of the ten -- the implication is that they are not Samaritans/outsiders -- take their religious duty as enough, rather than also coming back to worship their healer. Why would those who are "inside" that faith take the miracle for granted, while the "outsider" gets it?
How do religious duty and giving glory to God -- ritual and your spiritual life -- interplay? Do you ever get caught up in going through the motions and forget to kneel at Jesus' feet? Do you sometimes give glory to God but without a sense of discipline and regularity that comes from ritual?