Al Nassr problem is their back line is too fragile, just imagine after Al Nassr scored a goal then Al Ahli was able to counter the attack after that, this shows how bad Al Nassr back line is even though Al Ahli didn't make many shots and only 2 were on target but they could convert them all into goals so it's useless if Al Nassr has good quality in the front line if they don't improve their defense then it will be difficult to fight for the title.
Al Nassr coach is too focused on improving their front line that he hasn't thought about recruiting quality defenders to improve their performance in all areas.
The lack of preparedness of Al Nassr's defenders was evident from the moment Al Ahli attempted their first attack, and it was clearly a poor start.
I also agree with your opinion that Al Nassr is overly focused on attack without considering their significant defensive weaknesses.
Jorge Jesus should have a solution to this problem, as if left unchecked, it will undoubtedly worsen Al Nassr's title challenge once the season starts.