Dont dump him yet, but keep on eye on Malone, JVR and Tanguay. Chances are that if they're FA's now, they'll be FA's when you're officially ready to jump ship.
I will say this: If any of those guys really start lighting it up, I would drop Kovalev for him regardless of how AK27 is playing. I dont care if he has 20 points in 4 games because you know it'll be followed up by 0 points in 30 games, lol.