Is Disney redefining "true love"? Why?

Lately Disney seems to have changed the meaning of "true love" and the "true love kiss". For example in Frozen sisters' love broke the curse and in Maleficent the godmother's kiss broke Aurora's curse. Previously it was always the soul of a partner's kiss which used to break the curses and was considered as true love. Even in Once Upon a Time it's not always a lover's kiss which is considered a true love kiss, a family's kiss does count too.

Is this an actual trend or am I just making more out of a few isolated and unrelated examples? If yes, then what are the reasons and the background of this trend? Why is Disney changing the meaning of the true love kiss? Disney fairy-tales are considered to be made for teenage girls who do believe in price charming etc. Is it a way for Disney to give family values to kids? Or is it a way to focus on a more general audience than before?