I tested different options for Sam concert.
It doesn’t matter if Sophia is in a relationship with Ellie and Patricia or not at all . Or if Ellie is in a relationship with Julia or Logan or with nobody. The dialogues stays the same.
Sophia still talk about bringing Patricia, Ellie and a friend of Ellie.
So either, they won’t change anything and in that case I don’t know why L&p is putting that upon himself when the event promises to be a lot of work already.
Or Sam route will split. You can continue his relationship with Sophia or you can hook him with Ellie. Or Patricia. Because why not. I think it’s time to put some branching on the Sam path. The 25 different options on the Dylan route are not enough and it would be really cool to have even more events for each playable day . Like that we could have each day split in 5 or 6 . And maybe 2 years of waiting for each playable days. ( sarcasm)
Or maybe it’s not the Sam route that will be split but the event. One version where Sophia will continue her relationship with Patricia or Ellie. And one where you don’t have any points with Ellie and Patricia and you just continue the Sophia/Sam relationship and the girls will just be there doing nothing.
Whatever the case might be, and unless the other events are really small, we can consider ourselves lucky if this update come before November.
You only get
day18_Sam_invites_Sophia_to_his_performance
if during the pool event Sophia accepts the idea that in a parallel world she would be dating Sam.
So if you don't have that there will be no concert or maybe a very short version of that.
Concerning Patricia and Ellie, I think they will be just "supporting" characters for that night, not matter how many points or what happened with them before.
They are needed because it would be realistically weird for Sophia going to a concert alone.
They will be there to support Sophia, there will be some dialogues for sure but no particular progression in the story with them.
Personally, I don't see this splitting problem, just because they are there it doesn't mean that their respective paths will affect the event.
Even more, I don't think that neither of them (Patricia and Ellie) will play any role in Sophia's interaction with Sam.
Taking the car scenario as just an example, I think that if by any chance there is a kiss between Sophia and Sam, Ellie and Patricia won't see any of it.
For the simple reason that it will mess up the story with too many branches.
That being said, everything is possible. We have a lot of time to speculate about this!