I think it's more difficult for the forwards because not many have really played poorly. Moore has probably been the worst, but he's had a lot to come back from. On defense it's obviously Walker and Edler.
There are a couple of young guys who have gotten some rope though, primarily Durzi and especially Kupari. Rasmus looked terrible a lot of last year and they kept rolling him out.
Did they get rope, though?
Kupari was 31st in average ice time among all Kings skaters last season. Only higher than Turcotte, Grundstrom, Tynan, Lemieux, and Lias Andersson. And that's when he actually played. And which established vet did he consistently play over?
Durzi had a lot of rope last year because of injuries. And he was sat early this year when he made a blunder and the Kings just happened to want to get Clarke 9 games before shelving him. It's not like there's an established vet who is playing worse than Durzi that he is consistently playing over, unless you want to argue Walker? Even then, I'd say it's a stretch to say that they've really gotten rope.
And I get it - vets have gone through the rigors and "earned" their spot. But I think it's fair to say as an aggregate of performances, some players have earned more playing time (namely Spence and Bjornfot, but I also submit Clarke), and management* has not afforded the same accountability/rewards for good play.
*by management, I mean the collection of decision makers who collaborate and discuss where and when players play, be that Blake or McLellan or their immediate subordinates. As I know it's a complex decision for all these players, I want to acknowledge it's not just one person doing this.