If DPC kills off Sage, Camila or Riona due to some retarded thing that Quinn does, I swear that he will find out what being drowned in sulfuric acid feels like.
IMO there are way too many villains at this point of the game - Quinn, Stephen, Vinnie, Tybalt and Dawe off the top of my head, have all been painted as villains at one point or another of the game.
Vinnie and Burke still need to figure out what role they play
the other 2 have almost more comic roles than narrative ones and they have anyway a marginal importance (Tybalt you practically meet him only with Jill and Dawe only for Sage)
Quinn is everywhere, she is fundamental in understanding what Burke does, and fundamental in understanding what Vinnie wants to do, she has drugs, she has enemies, she has everything
But wouldn't it be hinted in the story that Vinnie could take the role of villain on the drug side, and we could say that Burke would take over on the prostitution ring side? That would leave Quinn's redemption arc ready, solid and believable.
with the speed at which things evolve it's fourth season stuff....
Vinnie is a competitor for Quinn, but it's a long way from taking her out of the running now that he's brought Lily into the picture.
Similarly for the restaurant, if Burke falls everything falls, Sage falls and maybe the BR falls, or it falls into silence or it is an event from the end game
and then there must be a place for both the Quinn who redeems herself and the one who doesn't