The No. 1 takeaway, which also is a giveaway, from Sunday’s 3-2 loss to the Chicago Blackhawks is that the Kings’ lack of offensive punch continues to be their No. 1 shortcoming. The Kings have scored 30 goals in 13 games, the fewest in the NHL as of Monday morning. They scored only two goals in three of their last four games and won two and lost two. This was a problem last season, too, before they began their remarkable run to the Stanley Cup. Mike Richards scored twice on the power play in the third period Sunday, doubling his total for the season. But the Kings simply need more goals and from more players if they are to repeat their playoff surge of last season. In fact, they’re going to have to score a lot more just to qualify for the postseason.