Requesting a better colour-distribution in charts, with expansion of existing colour palettes. Today, the criteria for color choice on columns are limited and do not embrace consistency when filtering and making selections. There are good alternative solutions in Excel / extensions that work significantly better.
Examples are:
Similar colors are selected so that a stacked bar chart does not clearly distinguish between two dimension values - assigns the entire range of colors independently of filters. Where the difference becomes clear, the colors are not very calm / representative (a lot of pink / pastel).