Hello Daniel,
At this point the chart data labels do not support automatic wrapping, but you can manually split the longer texts to multiple lines. It is possible to split each label's text at a different position by applying individual data label styles.
You can also decrease the value of the ConnectorLength property so that the label connectors are shorter.
It is not possible to get the actual height of the pie, but it wouldn't be very helpful anyway.
Best Regards,
Nevron Support Team