I really appreciate the honesty here, admitting Sprint 1 fell short and then actually cutting scope in response is exactly the kind of self-awareness that saves projects like this. The Echo Lens as a mechanic for revealing the past layered under the present is a lovely fit for the "cause and effect, not one heroic fix" message, and I'd encourage you to lean even harder into making that lens feel like the emotional core of the experience rather than just a puzzle tool.