It's a full life, if a trifle banal

I think trying to stick to at least part of the plot of A Study in Scarlet was a mistake. It's a weak plot as Doyle goes, and they had to drop the Mormon connection as not being PC. In order to make this Sherlock as extraordinary as he was in his own time, they are going to have to predict, as Doyle did in some stories, the methods that will be used in the future.