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I agree with your point about Al Nassr needing to strengthen their defense. Bringing in top European players to the SPL can definitely help improve the league's overall quality. As for national team coaches having concerns about young players moving to the SPL, I believe that exposure to different playing styles and higher levels of competition can actually benefit their development. So, I think it's a positive step for the league and for the players themselves.
I just reviewed the Al Nassr team squad, it seems they have recruited some new arrivals. After Alex Telles left and several other players, Al Nassr brought in several new arrivals. There is something that caught my attention, Al Nassr brought in two wingers and two defenders. However, one of them is a local defender. At least, Al Nassr made changes to make their team stronger with the players they brought in. Whether it's a front line player, as well as two defenders. Regarding the last point you said in this post, it is clear that this is one of the most beneficial impacts for the Saudi League itself. Well, Al Nassr has brought in several new recruits, will the new arrivals immediately perform optimally with Al Nassr. It is worth waiting for, especially Al Nassr's overall performance.