For charts embedded in a task view, the automatic sizing creates a consistent 'footprint' (each chart occupies the same space as the others). This is a good feature and this idea should not change that...
however where the enumerated string values are longer or more numerous, they take up a disproportionate amount of space leading the the actual pie/donut shape being much smaller than charts with less or shorter enumerated string values.
So this suggestion is to look at way in which the chart footprint AND the chart could be kept a consistent size. Options include having an optional hover over and popup legend that a user can click on to see which each colour represents; proportionately reducing font size for larger enumerated string values, or even cutting off enumerate strong value display after a pre-defined number of characters (e.g. 10/12). There may be even better options.
|Component||End User UI|
|Priority||Medium - Important|