I agree that this game can be played with minimal "stuff" , BUT , the immersion and aspect of the game comes greatly increased with all the "extras" you can put in:
I use my huge Heroclix collection to define the initiatives ( and i have minis for almost every character you can imagine) . I use scenes from the books ( currently playing/Watcher Civil War) to "frame" where they are and all the action , with the use of a tranparent plexiglass that enables me and the players to right over it , if needed.
I use the "doom pool raised box" to show at all times the current doom pool.
I use a "Watcher Screen" to hide the plot and enemies from players ( and only that information , because i thrown at them "homemade Transition and Action Scenes" , and them seeing before hand ,what was coming would spoil the surprise

).