1.) He is free next summer, try then. If we don't get him. All well.
2.) We need a CM, focus our money on that.
3.) Dybala, Higuain, D.Costa, Bernadeschi, Mandzukic, Pjaca, Cuadrado...we are already stacked. Add Kean to that list if you want an additional backup.
4.) What we have already gives us a lot of flexibility.
For the most part, those are my biggest reasons. Lastly, personal opinion of course, I don't think he is going to be all that special and seems to have an annoying attitude. If we buy him we buy him, I could care less. It isn't my money. If Para and Beppe think he is good enough, I'll happily admit I'm wrong when I see him perform well here.