I have an Italian mate who lives in UK but really knows his Italian football.
Was talking to him yesterday and he said Lamela is an exceptional attacking threat, extremely skilful and will score goals from the sorts of areas where Bale scores. Described him as a match winner.
However, he was extremely critical of Lamela defensively - said that when he has the ball he's one of the best but when he loses the ball he is incredibly lazy, making no effort to get back and help out his full back or win back the ball, being [b{more interested in gesticulating[\b] and sauntering back towards the halfway-line to await the next attack.
I have no idea how accurate this is, but the guy in question is usually extremely good on Italian (and Prem) football.