I've not yet seen it, but the music to Natasha/Pierre is wonderful, and I've read nothing but good things about the staging from the ART. I saw Dear Evan Hansen at Second Stage- personally, I didn't care for it at all, but it wouldn't hurt to check it out and see if it's up your alley.
I am a firm believer in serendipity- all the random pieces coming together in one wonderful moment, when suddenly you see what their purpose was all along.