My daughter (six) has been done with PM for a few years already - I do buy her the occasional set, but playability seems extremely poor. What she likes - like most girls her age - is Lego. Lego friends has been a winner with girls for years now, it’s such a massive brand. My daughter plays with her Lego Friends sets, she plays the Lego Friends games on the IPad and watches the cartoon on Netflix. In general the quality - of the games, and the tv show - are quite good, and better than the PM games and cartoons she’s consumed (I sometimes watch them with her).
Never ceases to amaze me how Lego is so in touch with the zeitgeist. They’ve recently released a kind of ‘braceletes’ lines, a bracelet you decorate with nice little lego bits, and then you wear, and which, again, is a massive hit with my daughter and her friends.
Not sure what PM could do, or have done, differently to be honest. More modularity to their doll houses could have been a start, and better quality media-wise. A good cartoon goes a long way with kids, but what there was was always very pedestrian and silly.
Oh well.