This could have been a great series, but nope. The Irregulars in this series has nothing to do with Sir Conan Doyles' irregulars. Apparently, in the late 1800's London, there's no bigotry, poverty or disease. A Prince rubs elbows with the unwashed poor. They become fast friends. It's not a mystery. It's a fantasy show.
Tooth zombies, a bad guy pulls a Hitchcock. How? Why? Who cares? Deductive reasoning and logic don't matter. Superpowers, that's what's in, and racism? That never happened-if you believe these shows.
I think the target demo are people who haven't read a Holmes story.
If this was about the "real" irregulars- solving mysteries, providing valued data to Holmes and Watson, while dealing with the harshness of 1880's London, it could have been instructional about poverty, racism and how the poor are invisible to the society they inhabit.
Also, why is Dr. Watson such an unlikeable character? He offers the girls money for their services-which is creepy, then threatens to send them to the work houses if they don't do what he wants them to do. The title should have been, 'The Merlin TV series revamp'