Is the nuclear family really an institution on the decline in North America, though? Certainly the concept of the 'biological' nuclear family as a heteronormative space is. But our family laws, child protection laws, schooling and housing structures, etc, are all largely geared toward the idea of children being principally raised in small family units, than large collective units (rightly or wrongly). Interesting question though. But I do wholly agree that we should make parkland decisions with the entire community in mind. I get that "family" can be a loaded term.
My only point was that the kiddies seem to utilize the small parkettes much more than adults do when they're given some playground equipment to play on and that unprogrammed tiny park spaces often go largely unused otherwise. Hard to imagine what this little parkette tucked away into Dupont could be used for.