While i personally understand your desire for more challenge, and in some games i challenge myself when i want to, i tend to play more relaxedly, and for example Night 12 is the perfect balance of challenge and reflex coordination, so while i understand devs can add "nightmare mode" for connosieurs as yourself, the difficulty of the game so far is tuned well for the average player. Believe me when i say plenty of players will get frustrated by night 11, not to mention the game is not fully released yet.
Case in point I got frustrated with nights 11 & 12.... I beat 12 last night though but it involved me keeping sanity at 0 and both doors closed, and hoping I didnt miss any bombs since that 0 sanity kills any sound cues you might get. Now Im here to patch cause I wanted to make sure I beat 12 pre-patch at least once. XD