Sexagenarian Princess Anne is neither Prince of Wales, monarch nor consort and is several notches below her nephew in the line of succession and her numbers far exceeded her nephew's as well.
Admittedly I am not a William fangirl but when I lurk on other royal related web pages I shake my head at some of the negative comments made about William and his wife, nevertheless I think that he earned the work shy label, I'm not stating that it should be a permanent label and also note that I stated that William has done an impressive amount of royal work in the past few months.
I am more impressed that William has done 120 engagement thus far in 2015 than the 140 he did in 2014 because this year he is balancing his royal work with his EAAA job.
She's the Princess Royal and has been doing this for decades. Harry is also much closer to the throne than Anne and does considerably less royal work
William retired from the RAF in 2013 after almost 8 years service. You and I obviously have different definitions of work shy.
William's future subjects are happy with him and given you can't please everyone I think he's doing a brilliant job