Broncos have had more chances, so from that point of view Sharks should be happy. If Broncos continue to get more chances, they can easily come back and win.
Sharks were dominating in the middle, but with the bench rotation that stopped. The bench rotation in the 2nd half could make a big difference. Plus the Sharks kicks for territory are terrible.
Sharks were (being a biased Sharks fan here) pretty unlucky with a few decisions in the 2nd part of the first half, but they also had some lucky bounces for 2 of their tries (they were just lotteries that came their way, though Pomeroy showed great strength to score his try). Could have been 22 - 0 up, but could have been 4/10 to 6, so a 10 point lead is pleasing enough. Not enough to rely on though, and Broncos with that much possession in the 20 as they had at the end of the first half will probably win.
Important half coming up for the top 8, shame we can't tell much about these teams against each other come September from an Origin affected match. Its a good match, could have been great with Broncos pack, Hodges, and Gallen and Carney.