Kopitar on-ice shooting percentage, 5v5:
season|on-ice sh%|points/60min
07-08|8.17|1.67
08-09|8.01|1.88
09-10|7.46|1.76
10-11|10.65|2.69
11-12|7.55|2.07
12-13|8.16|2.04
13-14|8.03|1.95
||
14-15|
5.85
|1.17
Generally, elite players have a better on-ice sh% than plugs, but in any one season, the amount of noise swamps talent. Over a 30 game sample -- less than half a season -- you get all sorts of crazy outliers.
Through 30 games... Sometimes elite players are near the top (Rick Nash, 14.69%), sometimes AHL defensemen are near the top (Nate Guenin, 14.41%). Sometimes AHL players are near the bottom (Zac Rinaldo, 2.53%), and sometimes elite players are near the bottom (Kopitar 5.85%, EStaal 3.93%, Patrick Sharp 4.17%).
Sometimes, those low on-ice %s are caused by injury - players just aren't able to create scoring chances like they could when healthy. When Getzlaf had lingering wrist problems in '11-'12, his on-ice sh% was 6.9% (his career average is 10.1%). Sometimes it's random chance. The goalies manage to make those crazy saves; your teammates go post-out instead of bar-down; the puck bounces on 2-on-1s; those deflections and rebounds end up getting smothered rather than kicked out to a teammates stick...
Whatever the reason, unless it's fully caused by injury and the injury will never heal properly, I fully expect Kopitar to be as useful a player as he was previously. Even if the point totals aren't there.