Atreus creator here. While it's true that most keyboards have [] on the main layer, {} and () already require shifting on a conventional keyboard. The Atreus l

Atreus creator here. While it's true that most keyboards have [] on the main layer, {} and () already require shifting on a conventional keyboard. The Atreus layout uses fn to hit these keys instead of shift, but apart from learning a new location, it's the same number of keystrokes. (There are no keys that require fn and shift to hit.) The only difference is that these keys on the Atreus layout are much closer to the home row, making them quicker to hit accurately.