When you have a Chart with PieSeries and enable the SelectionBehavior - selecting a specific value makes it split from the pie chart and stand out. We should consider exposing another state, where the integrity of the pie chart is not broken and the selected items are just highlighted or probably have a bold border, etc.
If series' ItemsSource is a collection of objects implementing INotifyPropertyChanged, the chart should be automatically updated when an item is updated.
Bring the LabelRotationAngle property to Axes in Xamarin.Forms. See LabelRotationAngle here for reference: http://docs.telerik.com/devtools/wpf/controls/radchartview/axes/axis
Provide more control over the series rendering
Currently the Annotation is always rendered on top of the series. Add a feature that will allow setting the series above the chart annotation.
Request for ranged series types. Here's an example of such a series type from UI for WPF http://docs.telerik.com/devtools/wpf/controls/radchartview/series/cartesianchart-series/bar-series/rangebarseries
Allow the user to customize the origin of rotation for axis labels.
Currently, depending on the platform, the first piece of the pie is drawn at 3 or 9 o'clock. It should be possible for the developer to set the starting point to be 12 o'clock.
Allow easy exporting of a chart to a Xamarin.Forms image object. This will allow the images to be shared using social media.