I've always been of the mind that she knows, but given her background in journalism and overall ethics, she needs to stick it; she needs proof. She's not okay knowing, she wants to beat him at his own game and get him to admit that, yes, he is in fact Superman. She wants to be able to land the story, even if it's only for her to know. So I do like the concept of it being a game of cat-and-mouse where the roles swap often. It's the only way I can see them updating a love triangle to work.
Be that as it may, I don't trust editorial to not mess it up to throw drama around.
It's interesting, but it betrays a pretty rough mindset of that time, which is essentially that marrying a character to his love interest is akin to pairing him up with his closest friend or ally. Lois was clearly intended to be more than that, but they're undercutting her role in Superman's life to be nothing more than his Jim Gordon, or Tanto to his Lone Ranger as it was put. It betrays a clear lack of interest or respect for Lois Lane as a character.
I love throwbacks and nostalgia as much as the next comic nerd but not everything old is good.