You can get rid of Staal, and it doesn't change the situation that much. How do you accommodate three right-shot defensemen to play on the PP when you already have two right-shot forwards that are going to play on the PP? Are we going to run a PP with 3 or 4 right shots? Also, while you can always use players on their off-side for the penalty kill, it's easier to have players on their natural side. I also think its going to have a balance of roles within all sub-sections of a team. You don't want too many players of a certain style at each position, too many players who shoot R-L at a position, too many players at a position who play the same roles. It's not great to have two players who fill essentially the same role in a team on the right-side of defense, and that role is more of a specialist role for now than an all-purpose role.
We aren't going to be able to keep everyone. It's made harder when we sign players like Panarin or Trouba to big contracts. We have a first round pick RHD who should be ready in a season or two, and we have plenty of other defensemen prospects that will be ready to play next year, as well. DeAngelo is already complaining about his contract, and I don't suspect he's going to make it easier after this season. That seems like a very easy decision to make. Trade him after the season, and let someone else pay him. Fox moves up into the role he'll have played last season and this season, and someone else, like Lundkvist, can move into the third pair role on the right side.