After this season, we have a few ways we can go with our RD.
1) Resign Kovacevic, keep Dougie, and not have Nemec/Casey at the NHL level, potentially trade 1 or both.
2) Resign Kovacevic, trade Dougie and promote one of Nemec/Casey
3) Not resign Kovacevic, keep Dougie and promote one of Nemec/Casey
I'd probably be in favour of #2, but only if we make a significant forward addition, though I would not want to give someone in their 30s term in free agency.
Dougie is a great guy and the offensive ability he brings is still important, not many Dman can score like he can, but Luke is ready for PP1 which will diminish Dougie's role, and Nemec/Casey can likely replace his minutes at even strength for cheaper, while freeing up cap space.
Though a trade would be tough to work out.