Not really. A few minor quests are apparently tied to the royal courts DLC. Tournaments are nice.

Northern lords : Some of the events for Norse characters. Norse dynasty legacies and cultural innovations.

Royal Court : Everything locked by Royal Court is in (the court itself, inspirations, court artifacts, hybrid culture etc) but toned down in a way.

Fate of Iberia : Events for the shadow reconquista struggle. Iberian dynasty legacies and cultural innovations.

Friends and foes / Wards and wardens : Most of the events are in, hostages and feuds are in as well. Everything toned down as well (hostages and feuds are less common and less important)

Tours and Tournaments : Grand tour, grand weddings and accolades are in. Tournaments are restricted to Fae.

Legacy of Persia : Court scholar position and events. Persian cultural innovations and dynasty legacies. Some of the Persia only events. Master Assassin court position and Fedayeen tenet for road of blood. Some of the DLC locked house unity decisions.

Epidemics and legends : 4 unique legends to PoD. Vanilla dynasty legacies tied to legends and such are in here, as well as the DLC locked epidemics.

Basically, we make use of almost everything locked by DLC, but frugal use. So the DLC locked features are very close to vanilla, but are toned down in PoD or only useable by a small part of the cast. We also barely modify them, since they are DLC locked, so not available to all our players.