Grand Duchess Maria Vladimirova comes from the most senior Romanov line, where two marriages maybe are open for discussion about yes or no being strictly Ebenbürtig (the two marriages involving Princess Victoria Melita of Edinburgh and Princess Leonida Georgievna Bagration-Moukhranskaya) but in comparison with the other lines, Maria Vladimirovna's line undoubtedly comes the closest in meeting the requirements.
What I admire too is her visibility and her energy. Until the end of the USSR, it were Maria Vladimirovna and her parents who were unstoppable in their energy, zest and commitment for the tsarist cause. They remained visible. Only after the fall of the USSR, other Romanovs popped up and demanded their own place under the sun.
Yes, I definitely regard Grand Duchess Maria Vladimirovna as chef de la famille.