While P20 has a good color sampler tool with variable sample sizes, something similar to Ps 'avg. blur' and 'pixelated mosaic' samples are much more useful; thus I suggest Corel adds these 2 features or something similar/useful; see jpg
Avg. blur based on a selection yields the avg color in the selection. Since the selection can be made in a variety of ways, it has far more capability than simple square matrix of 1, 9, xx etc. pixels from the color sampler tool.
Pixelated mosaic allows for not only color sampling but also to view the image in different levels (# of squares) of detail to see values/tones and color balance across an image.