Sherlock Holmes vs The Curmudgeon

I’m trying to give myself an out with the upcoming Sherlock Holmes movie. Yes, it plays fast and loose with the source material, but why should I go through life all sour and angry about fluff movies?

I can’t just turn off the curmudgeon, but I can make conditions. My condition is, there must be at least nuggets of faithfulness. What is the essence of Sherlock Holmes? Deduction. Encyclopedic knowledge. Uncanny observation. If those things are present along with the opium and pugilism, I can get on board.