Who DOESN'T want to live in this timeline?
It was never outright stated that Steph didn't know his identity. In Robin #126, he says "none of the big secrets", but it's possible that she did know. I think the intent was that she didn't, since he wore the cowl in her training scenes - but I have no real difficulty thinking she did know. She still wouldn't know about Matches Malone, which is the only key piece she needed to be ignorant of.