Hi Aaron,
Thank you for choosing Syncfusion products.
I was able to reproduce the mentioned issue. By controlling the radius of the pie chart you can align it close to the legend.
We already created a feature request on controlling the radius of the pie chart with highest priority and you can also view the status of the same in the following link :
http://www.syncfusion.com/support/features/chart/Default.aspx?ToDo=view&questId=1157Regards,
Jaya