Michael Bennett contributed exactly what my response was to be. Even the book recommendation. You can also visit www.jmbarrie.co.uk and read Barrie's notes which specifically mention the notion of having Mrs. Darling double as Hook.
With Smee, it implies that the children view their parent as the foppish boss-pleasing sidekick, which makes no sense. I expect that they did a little rewriting for PETER PAN LIVE to have it make more sense. I hope so.
"The Spectacle has, indeed, an emotional attraction of its own, but, of all the parts, it is the least artistic, and connected least with the art of poetry. For the power of Tragedy, we may be sure, is felt even apart from representation and actors. Besides, the production of spectacular effects depends more on the art of the stage machinist than on that of the poet."
--Aristotle