This also smells to me as a healing-process within the family.
QMII made the cut, so to speak, (we can discuss endless the circumstances and whether it was needed, but she did it) it's now up to King Frederik to dress the wound.
Fortunately King Frederik has always had a close relationship with both Nikolai and in recent years perhaps even more so with Felix, who is quite often near the Regent Couple.
And with Nikolai, who has always been the one who was most vocal about his lost status (and who still hints his misgivings), now settling in Australia, at least for some time.
And also with his relationship with his Benedikte becoming ever more official, the opportunities to heal the wounds within the family are lining up.
QMII, who is now officially sidelined, can sit in the back, knowing that what she did was the right thing (we can discuss the timing and the methods, but IMO it was the right thing to do), while the family comes together again.