Adding manual signal features (Impact Severity, Energy Ratios) boosted Class 2 F1 score but caused metric drop in Class 0 & 1, decreasing total leaderboard performance. Root Causes Multicollinearity : Re-creating Peak-to-RMS ratio when Crest Factor was already present. - Dimensional Mismatc...
Source: [Dev.to](https://dev.to/h4dis/feature-engineering-trade-offs-multi-metric-5473)