Yes, I agree. It is quite good and swiftly to the point. Having watched the episode several times (well all six actually) it plays out. I wonder what her thoughts are on Sherlock and Molly's relationship? In my view Molly is the most Christ-like in that she counts herself as nothing yet speaks her mind continually. In his greatest moment of crisis ("The Reichenbach Fall"), it is Molly that Sherlock turns to in order to save him from death and to make it possible later for him to "come back from the dead". We do not know how it was done, for we see Sherlock dead (or are supposed to) yet we know he is not and Molly is the key.
It's the best series to come along in a great while for crisp writing. I think Mark Gatiss (who plays Mycroft) is a genius.