If you got Sterling and amputated his legs and replaced them with Jesus Navas' lightning legs then removed his upper body and replaced it with Sergio Aguero's powerfull trunk. then took out his brain and replaced it with the brain of Kevin De Bruyne then you'd think you'd have turned a pretty rubbish player into a SUPER PLAYER but actually you'd just have cut half your team to pieces and created a horribly disabled mess.