Alright, I'll bite; why do you think he is overrated?
It can't be his goalscoring record:
13/14: 15 goals
14/15: 27 goals
15/16: 21 goals
16/17: 28 goals
And it can't really be his origin league where the likes of Ibrahimovic, Cavani, Hazard, Rodriguez, Falcao, Thiago Silva, Drogba, Henry, Benzema, Anelka, Ronaldinho, Ribery, Trezeguet, Wiltord, Pires, Aubameyang have all thrived and moved on to become excellent to greats of the game...
So what is it that you don't rate? I mean, I don't think he is the bee's knees, but he is an excellent player who has an opportunity to see if his style suits the Premier League.