I agree about Oma Trixie's potential to be a positive influence, not only on CA but on all three of the royal daughters. I know that my own family life was very chaotic and it was my beloved grandmother who gave me some stability and a sense of direction and values. I think of her every single day, and know that what she taught me informs so many of my choices and even my simplest daily gestures.
Partly due to the large number of children and grandchildren, contact with my grandparents was limited. Also, three of my grandparents died when I was relatively small. Well, a grandfather actually died about 10 years before I was even born. What was nice was that my remaining grandmother (with the help of her son and daughter-in-law who lived next door) celebrated several birthdays and certain special days of her 26 grandchildren in person. For her own birthday, she held an annual party, as far as was still possible, attended by all the children, grandchildren and various in-laws (of both children and grandchildren).
Unfortunately, she spent the last years of her life in a nursing home due to dementia and physical decline. During that time I actually had more contact with her. Through a previously demented grandfather and having often visited him with my parents, I "learned" to deal with dementia. That is to say, it was not strange to me. Ultimately, I "sensed" the death of my grandmother (at that time I traveled and stayed far, within the Netherlands, for my studies, etc.) My parents, who are normally quite down-to-earth people, indicated that they did not find such a thing strange.
In the case of Beatrix, she has years of experience as a former queen regnant. In my opinion, Amalia would benefit greatly from the guidance and the like from her grandmother