I believe most like playing intelligently. The goal of the level design shouldn’t be to make the intelligent move less rewarding, but to make the boring move less intelligent. So I kind of disagree with the offered solutions. A more modern set of solutions might be threats pursuing from the rear that make backtracking riskier than pushing forward, mobility or offensive options that favor aggressive moves over defensive moves, or (and perhaps I may only dream) non Euclidean level design such that moving backwards is actually a different area.

Situational awareness in competitive FPS is very impressive. I want to know what it looks like in non Euclidean space where assumptions about positioning get an order of magnitude more difficult.