I had to set my pie chart labels manually rather than allowing them to come dynamically rom SharePoint because the series labels will truncate if they don't fit into the pie space (note the "H" in Housekeeping on the top left of the screen shot below). So my ask is two fold:
1. Allow for series label wrapping (2 words or more)
2. Auto rotate chart if it would be better for the placement of the labels (in the screen shot below Housekeeping could have been rotated into the top area.