His omission from the WC squad has caused quite a bit of consternation in Argentina, particularly as Higuain was chosen over him, a player that has had numerous chances and has always bottled the big occasion.
Icardi is a good age. The fact that he's Inter's captain suggests he's matured as a personality. We would be signing trouble, much as we did with Costa. Sometimes though these players are worth the baggage, because of that competitive edge they bring, because of their personality, things we desperately lack at the moment. Icardi is a fighter, he's tough, and I think he'd build a rapport with the fans in no time.
He didn't just run off his teammate's wife however, that's not the full story. This teammate was his friend who had put him up when he first moved to Italy. He then gloated about it, posting pictures on social media of him with his wife and his teammate's kids, having the kids' names tattooed on his body and so on. Really appalling behaviour. This was a friend of his from his homeland and probably explains why he hasn't been picked for the WC, as it may not go down well with his Argentina teammates.
As a player though, you'd take him over Morata all day long.