Hi Kevin,
We regret for the inconvenience caused.
On possible workaround would be to keep the Labels for the pie sections to be short (thus minimizing overlap for small sections of the pie) and placing a more elaborate description of the Pie Chart section in the legend.
Please refer to this sample linked to below for an example:
http://www.syncfusion.com/support/user/uploads/chartpielegend.zip
The DrawItem event of the Legend needs to be handled to provide different values for the labels in the Pie chart and the legend labels.
Regards,
Davis