I do not think that Watson is necessary to tell a Holmes story but I do find that they do work better if some one is realating the adventure from a first person point of view. So in that respect yes Ms. King is doing a great job.
As for sticking to the canon, I think that all of her disparaging of Sir Arthur (not so much in Beekeeper but in subsequent novels) successfully renders the Canon we know as mute. Not what happened to Holmes but rather wild tales written by a strapped for cash Doyle (which of course they are). Most of her background for Holmes, I've noticed, has been taken from the book "Sherlock Holmes of Baker Street" by William S. Baring-Gould.
Holmes and Watson were created by Sir Arthur Conan Doyle, therefore the canon cannot be swept away in such an arbitrary manner. To say otherwise is utterly ridiculous to say the least.
As for sticking to the canon, I think that all of her disparaging of Sir Arthur (not so much in Beekeeper but in subsequent novels) successfully renders the Canon we know as mute. Not what happened to Holmes but rather wild tales written by a strapped for cash Doyle (which of course they are). Most of her background for Holmes, I've noticed, has been taken from the book "Sherlock Holmes of Baker Street" by William S. Baring-Gould.