If it works, it's awesome. I wouldn't recommend it to an average couple, though. Even an average aspiring rationalist couple should be extra careful.

Constantly showing your partner your weaknesses may be a bad idea. Partners are supposed to impress each other. Of course they know the other one is far from perfect, but that's not a reason to bring it to attention too frequently. I am not saying it could never work, just that it seems like an unnecessary risk.

And outside of the rationalist community... most people want to believe in mystery. Ruin the mystery, and you may have ruined the relationship.