There were quite a lot of good rookie defensemen this year surprisingly. Most were overshadowed by Hughes and Makar though. In my opinion, Carson Soucy is pretty underrated, as he performed quite well, 14 points a +16, while the rest of his team (other than Jonas Brodin) were all under +10. (I understand +/- is not a way to measure success, but it can still be used for most team comparisions, other than power play.)