There will be changes next year, there always are. Only one of Boyle or D. Moore needs to be back. Carcillo and Pouliot, if they both continue, they deserve to come back for modest raises. I'd try and trade Dorsett at the deadline. Similar to Niemanen in 2006.
Miller, Fast, and Lindberg will all be pushing for spots. Duclair is a wildcard although most likely not.
Let's sat for argument sake that Richards, Callahan, and one of Boyle or D. Moore are not retained. That's three spots. One would go to UFA, two to rookies to start the year. Carcillo can always be an extra.
Would overpaying Dan Boyle for two years make sense?
I'd say Moulson but his skating does not fit AV's system.
Rather than go for the big names, make a trade...look for value, and if the Rangers have to take back a bad contract like Havlat for a year, not the worst thing in the world.
The scoring isn't consistent at all this year, so if the top six are the Stepan and Brassard line, and Hagelin is playing with Miller and Fast, not the end of the world.
If that's the case, maybe the best bet is to go after Dan Boyle in the offseason and overpay him for two years.