Quoting: seb
Lehkonen is not a winger they want to trade. He is part of the ''finnish squad'' that helps Kotkaniemi, which also includes Joel Armia and Antti Niemi. Also, don't forget that Hudon had a 30 point rookie season. He is just not in the right place right now. Lehkonen is. He has top 6 potential, but the finnish squad, Shaw and Byron are players MB do not want to trade. Shaw is really solid with Drouin and Domi, and Byron is the mentor. Pretty similar wingers, but one is more defensively responsible (Lehkonen) and the other takes more risks, for better or worse (Hudon). Hudon is a fast skater. L.A. doesn't have enough of these. That's why they traded for Carl Hagelin.
Kings traded for Hagelin because they needed to get Pearson's contract off the books for the next two years to fit Doughty's extension. Sure, they wanted a roster shakeup, but Hagelin was just the return asset who will make the cap and roster slots work. It doesn't hurt that he's fast, but that's not why they got him. If the Kings don't have a miraculous turnaround this season, he's going to be moved again at the deadline for futures. He won't be back next season.
I'm not very familiar with Olofsson, but he appears to be a middle-six type center, and the Kings have an abundance of those with Kempe, Amadio, Anderson-Dolan, and Vilardi all in their early 20s and ready to join the club. Kupari is also playing lights out right now in Liiga, and will be NHL ready in a couple seasons. They have a prospect shortage at winger and mobile defense (preferably right-handed), so if they're looking to add to the prospect pipeline, that's where it would be.
The Kings don't want a winger with "issues," especially not in exchange for their #2 defenseman.
Your offer isn't unfair, but my guess is that the Kings say no because it doesn't improve their team.