This is so true, because MC being literally outcast and into hiding as the kingdom decree of his father, while the queen and the princesses were kept at the royal court - it equates to what happened to Harry in the Brittish royal family:
he was put in reserve, shipped off to fight in wars as a mascot for his squads where he was the nepo baby leader.
Just like Harry, MC is totally lost, pampered by his merry men who train and deffend him,
to be called back and officially sent to pasture:
MC and his elven sister are both married off.
Nobody has been declared the next in line or anything.
So everybody is living it up just like Harry and William had and Charles would go on have his very public very immoral affair outside of marriage with Camilla.
As long as Elizabeth was alive, everybody was doing a lot of immoral and stupid things in their lives, all of them coasting on her laurals.
He is clearly not after a stable realm, or at least isn't taking every opportunity to stabilize the rule of his children for the future. Something is missing here.
I also don't think you should equate characters from a separate storyline/universe with this one especially since we don't truly know what kind of character she will end up becoming yet.
Damon and his brother the king and his sister the regent are all living it up in the first season of House of the Dragon, just like Charles and William and Harry have been before the corronation of Charles.
Cass is Damon because in the first episodes he is vying to be declared the next in line to the throne, something Cass is trying with her scheming - while everybody else - like MC and his sister - are totally oblivious and are simply blindly accepting being married off.
Cass is enthralled in the politics, she is member of the council - something Damon also was - trying to impress the king to name him as successor. CAss cannot wait any longer because the royal house is falling apart:
There is no successor declared officially, the already marries off prince and princess could go to their new homes any moment now and is the king suddenly succumbs to any ill fate, Cass would be de facto left to run the council while the Quen would rule.
Remember that the sister of Damon was the actual strategist, a powerful woman with mad dragon skills who is totally wasted in the battle of the royal kids in the second season, where the largest dragon in existence simply bites offf the life of her dragon and sends her to her doom, while she herself was a total sacrificial lamb to save the scaly disgusting hides of the coward Damon and the sniveling incestuous dimwit daughter of the former king - who has been a breeding whore for countless unmentioned ”knights” in her service.
The king has not declared any future successor - it would have to be a huge cellebration when that happends.
MC is still in everyone eyes a bastard, a second fiddle, the ostracized prince the king hated - or still hates, if he is indeed also smitten by the visions of higher powers, tha kind of visions Mc has been manifesting as of late.