If Carlson bolts, one of our left twigs can move over, and sink or swim take on a bigger role. We could move Orlov to RD, or move Jerabek / Kempny over.
Instead of all the focus on retaining Carlson, focus on replacing him. Try it internally, and don't continue to fear using young players. Look at Pitts D less Letang. Somehow, it worked. It's called center depth.
Someone this winter said, Carlson at 4M was at his best, but then we will be paying an extra 4M next year for the same player, or maybe even less... hungry. The key thing was, we parlayed that and him into a cup. Everything, was perfect. Except creating the impossible to sign player. There is only him. This is a dream UFA scenario. A nightmare, for our cap aspirations. But it almost doesnt matter, because we won the cup.
Teams that win cups are trying to churn out guys that play great for 4M. Don't panic, continue using what we have, and add as needed. If BMac can pull off more Kempny/Jerabeks cheap great pickups, we can survive. If we ink John at 8+, BMac is handcuffed and less able to do his thing. Loading a roster with a top heavy cap hits, is just not easy to manage.
I hate seeing players developed and bolt their original team as soon as they get great, but that is the modern NHL now. I would like to see teams more able to retain home grown talent. Exemptions for great GMs. Dynasty teams can no longer exist.