Reading some of the comments surrounding Sterling suggests to me that a lot of people fundamentality don't realise what sort of player he is.
In his prime he was never an efficient killer, his gotten stick through his career for missing chances and occasionally giving the ball away. What made him brilliant was that we was always a high volume chaos maker. He'll take players on, he'll get into dangerous positions, he'll create chances and he'll get shots off - similar to Martinelli.
What's been more concerning is that he's looked old to me off the ball. His intensity, strength and tracking back look off, but hopefully that's mostly a lack of sharpness.