The show is interesting in that, it's Sherlock Holmes, in the broad strokes. But everything is different. Not that they have much of a choice, since the BBC Sherlock have a vested interest in ensuring this version doesn't copy cat theirs.
The relationships between the characters cannot be as per the original, it makes sense, but so far, whatever it is they have, is working. I'm entertained, so, for me, I'm happy.
Just can't wait to see how they will implement Moriarty.
A transgender character being portrayed by a real transgender person. Interesting. Why not? Ms Hudson was Holmes' landlady in the original version. In this version, I suspect she will become a recurring character who, may even become a regular if she becomes popular with the viewership.