You should know better, "top line" is just the names on the protocol, he was 10th in TOI amongst Traktor's forwards.
Same concerns Kravtsov though, a lot of coaches in the KHL don't give a damn about the way they fill the lineup card, best players can be penciled in as a 4th line for all they care. For example, Kaprizov - Shalunov - Shumakov was nominally CSKA's 3rd line throughout the last season.
Regarding the trade, it's far more likely he signs an extension than gets traded. Traktor never even traded Kuznetsov, who had far more value, so there is close to no chance they would see the need to trade Kravtsov for pennies.