If I recall correctly, Sander's goals have come when he is attacking down the right (someone can correct me if wrong, but he always seems to be at the far right post, facing the Kop). Yesterday he seemed to be always coming down the left, from where I was sitting.
Not sure if that was a deliberate tactic yesterday, or not.
He has all the skill in the world, but needs to be "on it", where he shrugs off players for fun, outpaces them, and fires back in from the byline.
Not sure how you get him revved up prior to kick off, but Hecky and co need to find a way, because the "on it" Sander is an absolute handful. The "casual" Sander is just a passenger, at times.
On saying all that, I would have hooked Fleck off first, out of midfield, he was offering nothing.