For breakfast, fruit is served as a fruit salad. For after meal services, fruit is presented in a fruit basket (at least on SQ. Don't know if it's served like this on MH). It has never been my concern as to what fruit is served. OP was on a breakfast flight and he got a few pieces of nicely cubed fruit. I wouldn't call it stingy but perhaps that is the way the catering was done in HK. Have you seen how teeny weeny the fruit is cut in those Del Monte tins?
On a recent domestic flight, there were ample sizes of fruit in the bowl for breakfast. So I think it has more to do with catering from certain ports rather than MH 'cutting back'.