Havana are there teams in your league that could get better if they did a 1 for 2 trade with you - where you upgrade? If there is then yeah I would be having a chat with them about getting an upgrade at C. Failing that I wonder if Carter would gain you an early draft pick?
I think it would be tough to upgrade your forwards, they are pretty good for a 10 league where 8 forwards each are kept. I think I would keep Voracek over both Carter and Granlund. Coin toss for me between Carter and Granlund for the last slot. For near future production I think I would keep Carter - Granlund will be good but his upside isn't through the roof and he is a C which are easier to come by.
Yahoo weekly starts 12 team league, keep 17 plus farm
GS, W, L, SV, GAA, SV%, SO G, A, P, +/-, PIM, SOG, GWG, PPP, SHP, HITS, FOW
3C: H. Sedin,Stepan, Stastny, R. Johansen, Hanzal, Anisimov,
3LW: Burrows, Vanek, Ott, Lupul, Dubinsky
3RW: Doan, Pavelski, Brown, Okposo,
6D: Franson, Doughty, Voynov, Subban, Markov, Gonchar, Karlsson
2G: Price, Emery
Farm: (< 100 games): S. Elliott, J. Bernier, Galchenyuk, Etem, Eakin, Atkinson