I haven't watched a single game in like 2 yrs, but I'd bet this guy is crooked, they know it, and that's why they are willing to do whatever it takes to get rid of him - including at the expense of signing another possibly crooked player in Lukaku.
I'd say both the player entourage and the club are hiding something - they probably know this guy needs surgery or stg to try to get right. Playing with a troubling grouch should really limit the guy.
They also are probably desperate to improve the balance sheet - Vlahovic's installments + sallaries is probably the greatest annual cost on the club.
To top it all, he is coached by Allegri.
I say, do it then.