Kopitar's legacy will be one of being so underrated that he is overrated.
He has been a consistently very good player whose role has been just as much of a detriment as a positive. It is very, very difficult to succeed with a pessimistic #1 center who consistently left 20-30 points on the table nearly every year to play it safe when.the team has so desperately needed more offense.
He has clearly been the teams most talented player, an absolute workhorse, since day one. That will be missed for as long as we are all still around. But the days when the Kings have a number one, TEAM driving center who takes responsibility for the team's offensive output instead of just being the guy who happens to collect the most points will be welcomed warmly.
I don't have a problem with Kopitar, he is who he is and that is a definite Hall of Famer. But the problem is that he has been too good to replace, and the team has only ever succeeded with him when the roster was packed to the rafters with talent and aggression. On his own, he isn't the type of player or personality to lead any team anywhere other than exactly where they would be without him. His legacy is a supremely talented supporting player, not a driver, who favored safety over maximizing his potential.