Why not? I think Jovetic is downright amazing. Already brilliant and can only improve from where he's at. I've watched about 10-12 Fiorentina matches this season, and I'm very impressed. He's a combination of both chance creator and finisher, a second striker kind of player like Lisandro isn't, so there is room for all of them, Lisandro, Llorente, and Jovetic.
But given the choice I'd take Jovetic over Lisandro Lopez any day. Would work wonders with Llorente as target man to complement him.