This is worth a read - as it covers a lot of what we're discussing here:
https://www.brightonandhovealbion.com/news/2264045/albion-analytics-debrief-leicester-city
Re Sanchez, he's doing brilliantly, and can only get better.
One thing we need to sort out is teams blocking him off at corners, negating his ability to get to the ball. Burnley did it very well, but against Leicester we might have made a change to respond, which is to place that player...