You wouldn’t get an episode like Manhattan on Once nowadays.
What made Manhattan work was that it wasn’t about action or the big reveal (since everyone had guessed Neal was Bae), it was about the emotion. It was the episode where Rumple finally found Bae. Manhattan was about the Rumple/Bae relationship which was one of the foundations of the show.
11 episode arcs doesn’t allow for a Manhattan episode, there isn’t time and that’s a shame.