I happened upon your post - I don't know the direct answer to your question, but I believe there is an extension which is a pie chart with lines leading out to the values. I'd look it up for you but I'm a bit pressed for time - it may be worth investigating and I'll take a look myself a little later if I get the time. Sorry I could not have been of more direct help.
Is the labeled pie chart really included in the standard QV installation these days?
I am running latest QV11 SR4, and the extensions I get as part of QV desktop, when installing the Extension Examples.qar are:
Are others seeing this too? Or am I missing something?
If you want to use a QV only solution, you can try to sort your chart dimension like
Largest, Smallest, 2nd largest, 2nd smallest, 3rd largest, 3rd smallest ...
Maybe using a sort expression in your chart like
comm91890.qvw 174.2 K