I don't think that's true, but it's really more from the sheer volume of games Killorn was on Leo's line versus Cutter's games with Leo, the ratio is probably higher. Dobberhockey has Killorn as being on Leo's 5 on 5 lines for 94.8% of his total 5 on 5 ice time.
Either way, the pairing just makes sense and seems to be starting to put together the chemistry they need. With a little more finish on some of their chances they could've had 1-2 more goals last night.
Killorn gets my respect for actually putting in an effort while other, younger veterans are bagging it. In terms of Veterans being an example for the kids to follow at least we can look at Killorn and say he's hustling and trying to win battles. He doesn't always succeed but I can't knock his enduring compete level, especially when other veterans seem to be checking out.
But the problem comes when he has to be part of maintaining the offensive flow of an offensive zone set play. He's pretty decent when it comes to neutral zone breakouts as long as he's on the defensive side of the neutral zone. If he's on the attacking half, 80% of the time he just dumps it in even if a linemate has a rush lane to attack with and he often does it when his linemates are not positioned to chase and recover the dumps. When it comes to a 5 man offensive zone set up, I really don't know what it is, maybe pressure and or nerves but his decision making with and without the puck seems to be tank in those situations. He's fine at skating the puck around to cycle and is okay at handing pucks off to the point to keep possession going but when it comes to passing around mid to high danger areas or receiving passes in those spots, he's really subpar. And in spite of some counter rush assists, I really don't see that Leo and Killorn have developed any chemistry with respect to chance generation or even in transition play for zone entries.
Leo and Cutter should be kept together. But they should find another winger for them next season. If not a UFA or trade add, maybe try Colangelo with them and move Terry to a line with Zegras and Mac. Killorn can be a defensive buffer for Strome and Vatrano.