You don't always have to 'replace' points depending on production as a function of time on ice, obviously.
You could see Cuylle go up 20 points because of more ice time, in which case you're really only replacing 40 points which you could do with a 3rd line player like Kakko. Really depends on how you think young players will grow into bigger roles with more ice time.
I'm of the opinion that with a well coached team and consistency from Miller, Trocheck, and a solid third center (Whether that's Mika, Duchene, whomever) guys like Berard, Othmann, Perreault could be at 40 points+ sooner than later. Cuylle could be looking at 55+ if he spends the whole season playing 17-18 minutes a game. Might hit less, but still.