Quoting: amullican
Lol KK is not a cap dump. Dude is only 23 years old, still has plenty of upside. He's struggling right now, but that doesn't mean he doesn't have value. His current trajectory is actually pretty similar to Tomas Hertl early in his career. Not saying KK will definitely turn it around like Hertl did, but it's possible that he could.
He makes 4.8M for the next 6 years, is stuck on the 4th line, and doesn’t provide offense. You can get just as good or better players for your bottom 6 for much cheaper (example: Teddy Blueger)
Hertl in his 3rd season had more points than Kotkaniemi has had in any of his 6 seasons. Hertl in his 6th season had 74 points, while Kotkaniemi is on pace for 28 in his 6th season this year