I buy into the theory that Drogba leaving meant there's basically no fire under Hazard's ass and thus no real desire to perform. To be a broken record, this is why Cech should have been retained. It still feels like a strange dream that he wasn't. It'd be immature to dismiss psychology as a big factor these days when it comes to players and their ability. If you're the best in your own head, you'll at least be decent with your feet. If you're only decent or very good in your head though, you're not exactly shooting for the moon, so you won't be landing amongst the stars if you fall short.
From before he even arrived here, the 1 common trait that Belgian and Lille fans alike would highlight was: "His mentality." Mentalities don't change very quickly in the world of football when you're an idolised millionaire. I expect no changes.