When we talk about a defense line, the goalkeeper and the defensive midfielders are included the same the same thing applies to when we talk about attacking line wherever the attacking midfielders, wingers and strikers are included. Al Nassr's problem in the last two seasons is nothing more than their poor performance of their defense line and that has cost them a lot during these times. From your analysis, it obvious the club manager already have taken notice of the weakness of his team and would therefore work on it with the best available players at his disposal. Personally I would want to see Al Nassr challenging for the biggest trophies this season.
We are having surprised start of new season for the Al Nassr because they are having no improvement and things are going as we ended in last season so most chances we will be had results are also as we have in last season, but this time things are looking not easy because we are having good improvement in other teams which will surely disturbed them.
In early games they are having setback but still we are having no improvement which is going to have not ideal for the team like Al Nassr which is having good challenging time, and they are spending good amount for new players, but we are having not quality defense so look like we will be having another good season for the Al Hilal, and they will dominate like they have done in last season.