As someone semi-new to using emacs, (I knew basic keybindings but never bothered to set up init files, etc.) coming from the IDE world, my biggest complaint was the amount of things I had to do to get vanilla emacs to behave in a civilized way, even using the GUI version. I spent hours scouring peoples emacs files on GitHub to try and find all the things that looked "obvious in retrospect" and settings that looked silly to have turned off by default (e.g. commands that act on regions should act on lines when no region is selected). Then my second biggest complaint was the analysis paralysis of all the plugins. I'm starting to get a stable emacs file, after a few months, but there's still several pieces of functionality I miss from my IDEs that I chunk out time every now and then to research and add. I think having a "if you're coming from IDEs you may want to install X Y Z" page would be helpful, as well as package download rankings so that people can find the popular projects (e.g. helm, use-package). It should also be prominently encouraged to use something like guru-mode where it disables the arrow keys to force you to use ctrl and meta as your movement keys.
Also you can pry Magit from my cold, dead hands.