This is from the Ducks annoucement of the jersey:
"In addition, the new jersey technology fuses print and embroidery, reducing the weight of the crest which results in a lightweight jersey for athlete performance. The NHL Stadium Series jersey was designed with creative input from the Ducks, Reebok and the NHL."
They make it seem like going away from the traditional design will reduce the weight of the jerseys by 50 lbs. and allow players to be 2x faster. Fact of the matter is, the jerseys will cost 25-50% less to make, thereby leaving Reebok and the NHL with that much more profit.