[@BrokenPromise] Yes because I shouldn't be dictating what everyone needs to do with their character. After they go to the location they should go to then it's up to them with what they want to do with their characters. In this roleplay I've had the same character (my own granted) forced into two separate routes before due to being paired with different characters multiple times. Prideful, and calm Lancelot didn't go and listened to his master. Angry, and brashful Mordred grabbed her master and literally dragged him there. I don't leave them blank, and empty with nothing to do either. They stick around the church? Talk to other people let there, the priest who gathered them there, or perhaps simply speculate on the events at hand. Leave? You can run into another servant. You can go home and prepare more. You can go to the actual fight scene given and do things there. You can talk things over with your partner. Also forcing everyone at the church prevents anyone from interacting with the partner/servant and preventing character from giving backstory, and or allowing players to interact with other players before they get there. 

In this specific roleplay Leon always arrives second, and meets a character who has always been so far Togami. In this circumstance nothing changes except for the difference in his partner. Then whoever arrives next meets the new comer and talks to them leaving the trio isolated waiting to see if anyone else arrives. The meeting while almost mandatory in the roleplay is not in the context of the roleplay as it is an open invite from the aforementioned priest/overseer. Servants aren't let inside for the safety of the humans and thus can interact on their own as well they can observe, and try to spy on others or they can try to be open. Lancelot disguised himself and hid in plain sight, and Mordred immediately went up to someone and demanded they acknowledge her power. Jeanne of Arc goes and keeps herself hidden out of caution. 

You may have your own biased opinion against group scenes but I feel them necessary as a classic DnD player. Simply put the group characters need a common location to meet and then be allowed to branch off into what they want to do depending on the character.