> the wide range of functionality on the site can feel overwhelming and difficult to understand I guess it must just be my lengthy history with the web, but this line is like nails on a blackboard to me. It's OK to have to learn how to use powerful tools!
Your design should fit your audience, and I think it's a good change to have a sidebar with tools that are surely ignored by the _overwhelming_ majority of users not be presented in a persistent, important location.
Also worth mentioning that they aren't removing anything, just altering presentation to better suit the common use case.