Solution: show only the main features and hide additional features under an "advanced features" or "settings" button.
The Emacs equivalent also works nice: press a memorized key binding for something that you do frequently, or press M-x to type into an autocompleted (and fuzzy searched, with the right packages) list of commands for some particular functionality.
The overall principle is sound, IMO: present the "simpler" UI up-front to not overwhelm newcomers, but have advanced features available and a means to bring them up to front of the UI, for repeat users.