Most damage is done ramping up to boost (peak of torque) and peak of HP.

Whats the "long term" feedback correction like?

Instant knock event's are helpful however long-term feedback is more useful.

Infact posting up the 2D grid from the ECU

RPM down one side and Load across the top and then finally instances of knock in the guts paints a better picture.

IE
0.5 0.7 1.2 1.8 2.0

800-1600 0 0 0 0 0
1600 - 3600 0 0 0 0 0