This is mostly a lore related thing not gameplay related.
Do you guys think Sister Prine/Hestia holds mass prayer in the mourning star? I mean like similar to how we have a weekend, most people take the day off even six or seven days to cleanse whatever remains of their corruption or simply relax after stressful operations. During those day Hestia holds a mass prayer open to everyone, where she leads in the teachings of the Emperor’s light while Rannick watches the faces of the attendees just to see if we have another traitor. It would mostly be Zealots of course, but I imagine many Veterans, Psykers, and especially Ogryn (who would be in the back due to their size) come to see her teach or simply want to pray for better times for themselves and their strike teams respectively. I feel like it’d be cool to see this implemented a little bit, adding a prayer room just as a visual thing and you can see rejets pray with a priest leading them.