Ultimately the game is a satisfactory addition to the RTS genre, but the slow paced growth and underwhelming improvements over the original game leaves me reluctant to recommend it to anyone other than hardcore fans of the series and genre.
I've tried to temper my enthusiasm for The Vanishing of Ethan Carter, but it's difficult to remain objective when writing about something you've genuinely enjoyed. If you hate puzzles, you won't like this game. If you only want fast-paced, explosive action then you won't like this game. If you want nothing but to be scared senseless, then you probably won't like this game. If any of the above apply then you really should look elsewhere, but if you want a well-crafted (and at times totally insane) adventure through a twisted, but beautiful world that's driven by a compelling plot then The Vanishing of Ethan Carter is very much your kind of game. It's on steam now, at only £14.99.
Overall Sherlock Holmes: Crimes and Punishments is a fitting title and if it weren't plagued with various problems like load times it would have been an even better title. It is a great crime thriller and if you are into that sort of game I would certainly recommend picking it up.