The impression I got was that Vicky and Fritz's younger daughters were keen to leave the stifling and quarrelsome Prussian court behind, whereas Irene took it on as much as was needed within her role and marriage. With her awareness and involvement in the Russian secret family tragedies as well, not to mention her own burdens and grief, I think she took on as much as anyone could with family antics and issues and worries - if not more. It makes some of the contemporaneous constitutional spats look minor by stress-comparison!