That's sort of the problem. The mid-season and season finales delve into interesting territory, whereas everything in between is just procedural filler. I expect two or three episodes into the second half of the season in January we'll go right back to the "safe" weekly format. I'd wager that the clip of Nick finding out Sean's identity is from the final or penultimate episode of the season. We're probably not going to get the good stuff again until they've burned six more Wesen-induced murder plots.
In my ideal fantasy world, I'd like to think that Sean and Juliette will become a part of the Scooby gang, Nick will realise that being a Grimm is a full-time job, quit the police force, start an Angel-esque PI firm, Hank will come with him out of loyalty, and we can ditch the annoying crime drama stuff permanently. It will never happen, but it's nice to dream about every episode being as good as these bridge ones.