My only fear is that Higuain is used to being the tip in a 4-3-3 formation. he had that in RM and Napoli also.
Maybe that's why we got Pjaca and considering Gabigol - There could be a Transformation where Dybala will play lower to make Pipita the lone striker.
He only needs to be explosive around that final third, not chasing around like mad, but we should recognise the difference between him and Mandzukic in that respect. He's not lazy, but he's not a Mandzukic or Tevez in chasing back. He wants to score goals.
Higuain does have an awkward frame, sorta like a bird chest. His legs are massive so its hard to call him overweight. He hustles quit a bit for his size. lol all the muscle he gets goes to his legs.