Nah man, their tragic flaw is obsession. It's not a whole "pure love" thing, it's pure obsession, which we can see right away as Romeo was head over heels before he met Juliet, in which, he was head over heels all over again. Juliet plays right into this as well. Instead of being calm or rational through anything, they both be cray cray. Killing oneself over a lover's death that you met like, three nights before, is not anything romantic or powerful. Straight up obsession, the both of them.
The gang problem with their family is still very much so a problem, but like you mentioned with the whole "opposites", its because everybody is just so extreme, like Romeo and Juliet's obsession with one another.
This is a problem of not meeting half way on anything. Romeo and Juliet eventually did meet half way, as they're from opposing families, but in the end, they still couldn't stop themselves from being Us against Them, only this time it was Romeo and Juliet vs. the world. - KrissLucia