3. No More Nude Scenes
The first episode of Series 2, A Scandal in Belgravia featured both Benedict Cumberbatch and Lara Pulver in their birthday suits. Of course, nothing explicit was seen, but such blatant fan service pandering cheapens the show from a serious drama to fodder for .gifs that show Sherlock almost dropping his sheet and exposing his behind. Sherlock Holmes himself is an advocate for cold, dispassionate, logical analysis - not sensational extravagances that ultimately distract from the case. Even in the original stories, he was against it. Take this quote from The Sign of the Four: Detection is, or ought to be, an exact science and should be treated in the same cold and unemotional manner. You have attempted to tinge it with romanticism, which produces much the same effect as if you worked a love-story or an elopement into the fifth proposition of Euclid.