Normally a 15 goal scorer whos not a striker would sell for big money in the league, but I dont think anyone would give us 40 million for him. To me thats a sign of just how much he goes missing for 89 minutes.
While we are the 7th highest scoring team in the league, I think we are legitimately 15 goals a season away from competing for the top 4-6. I think Siggy could be fine in a side that could produce that, as in reality we SHOULD be getting that extra production not from his position, but from the striker(another 7-8 per season), a CM(another 3-4 per season, our CMs rarely ever push up and score), and one of our wing spots(3-4 per season). If we got proper production from those 3 positions we would be scoring at a rate appropriate of a CL team, so I dont think hes a problem, just lacking in some ways.