Best takeaways are Millie Bobby Brown is a charismatic star who can do a lot and not just Eleven. I like the IDEA of a feisty Holmes relative solving crimes and being an outsider in Victorian romance but I found the romance stuff limp and uninteresting and the film spends waaaay too much time on it. The fish out of water stuff was vastly more interesting and more allegiances and exploration of fellow castaways from the British caste would be much more scintillating. Also can we have more deduction instead of just anagrams?
Also I like Henry Cavill but as Sherlock Holmes? Eh.