First of all, the Game hasn't even completed yet and there are 13 more episodes to come, so how are you so sure that Lana's appearance in the story is of no value ? If MC is on Jill's path, it will affect him as well. The campaign Jill is trying to start is related to her sister.
Why did DPC show the past of Josy and Maya? So that we know that Derek fucked a girl? So that we know how Maya and Josy got in relationship? Well, DPC has gone mad,
the story is about MC, showing this was wastage of time as it didn't affect MC
Why did DPC show how the DIK's started? To know the relations b/w characters at that time? To know Vinny's personality? To know how DIK's started? Well, DPC was just wasting our time,
the story is about MC
And you say that Buddy or Rox's appearance was meaningful...
Why? It was shit and wastage of time, it didn't affect MC so it was useless. Because the story is....
So knowing about Quinn's past gives her explanation of knowing Junkies, but knowing about Jill's past doesn't explain anything? The moment this Jonathan guy is Introduced, I wonder what will you say?
Edit:---------------------------------------------------------
And so Quinn's backstory is Important !
which is not at all affecting MC...And Lynnette's backstory is not Important,
Which can actually affect MC...
And Since Quinn will be a LI...So Jill is a Side character? Got it!
So Chad's character development is great ?! But it is not affecting the MC....So once again, DPC wasted our time !
I think that first you should yourself make up your mind, whether the story is only about the MC and other things are useless...OR.... Other things have meaning as well, given that you say that Quinn and Chad things are not useless