There doesnt appear to be a description on the PSoC4 Cap sense datasheet (2.40) about CapSense_NormalizeWidgets(). What does it normalize?
Here is an explanation of the change. Normalization makes IDACs of all slider elements to be equal to the IDAC of the element with the lowest sensitivity. This change has a large impact in the case of the slider design rules violation or when the component is not tuned well (the parasitic capacitances of slider’s elements are very different or the sense clock is too high).
Also here is a manual on the Capsense.