Killorn has put up 33, 35, 34, 26 and 39 non PP points the past 5 seasons. Stamkos last 3 full seasons he has 47, 41 and 53. Killorn is a consistent 30+ point ES guy while Stamkos is a 40+ guy. It's not like Stamkos is putting up 60+ points ES where someone like Killorn would drag him down that much. That's while Stamkos was getting top line minutes with top line players and Killorn has been trolling on the 3rd line. Stamkos will still get his top PP time to pad his stats, he needs to up his ES play and this will force him to improve there.
Stamkos is in the 80's because of the PP, which he still will get time at. I think we should see how he does carrying his own line for once. He was carried by St. Louis for years and has been by Kucherov lately, he needs to earn his money.