I wouldn't call it "hand over" and it wasn't recently.
"Mothers' Help" is one of the patronages Alexandra did not keep when she married Martin. It seems this organisation then asked the Crownprincess to become patron and she accepted.
It was announced in February 2007 which patronages Alexandra would keep and which she would give up. I haven't read that she gave up any more of those patronages she kept.
Alexandra is still a patron of Unicef, more trips may be coming up!
I don't know what will be in the future, but I do know what wasn't in the past - and IMO there simply wasn't enough. And somehow I doubt Alexandra will do more now with Marie on the scene than she did in the last 2 1/2 years.
Regarding Alexandra's annuity from the state I think we have to remember the situation back in 2004.
Alexandra was the (media) star of the family for such a long time, she was extremely popular, the announcement of divorce came as a shock to the people and the media was completely at her side and blamed Joachim. And I do remember that the organisations Alexandra was patron of were quite afraid of their future.
In 2004 it seemed to me that it were actually the Danish people and media who were afraid of losing Alexandra totally. I really don't think the parliament granted Alexandra an annuity because Queen Margrethe forced them to but because they thought that's what the people wanted.
In the meantime of course much has changed and perhaps also the feelings of the people towards Alexandra aren't as warm anymore as they used to be.