While Crawford is definitely not an "elite" goalie, he's solid enough and is a big piece in Chicago's success this year. I don't know if I'd move Sedin for him straight up but if you really need the help in goal and could get another piece added to CC I'd do it.
20 Team Dynasty (points per) - G (25, 50 for defense) A (25) PIM (3) +/- (5) PPG (15) SHG (25) OTG (15) GWG (25) HTr (50) SOW (75) HIT (1) BLK (2) Use actual NHL salary
F: Malkin, Tavares, P. Kane, Neal, Nash, Okposo, Moulson, Ott, Whitney, Iginla, Pouliot, Garbutt, M. Martin, Stajan, Raffl, Klinkhammer, Clune
D: Green, Ekman-Larsson, Bogosian, Gudas, Stone, Oduya, Ranger
G: Anderson, Lehner
Farm: Grimaldi, Gaudreau, Hurley, Hartikainen, Stransky, Fast, Tarasov, Petrov, Kosov, Kujawinski, Maidens, Nurse, Ceci, Donovan, Ekholm, Thrower, Kichton, Borowiecki, Marchenko, Poulin, Nilsson, Andersen