The current squad is not even competitive enough to compete against Al Nasr and Al Hilal. Clubs need to change coaches as soon as possible. A club's coach, if talented, plays an important role for the club. There are some teams that do not play well for good coaches. Al Hilal is a good team, but it is incomplete without a good coach. So it should be resolved very quickly.
Man, which team do you refer to? Please mention the team first before explaining anything.

Sure, Al Hilal and Al Nassr are 2 top teams in Saudi league. If other teams want to compete with these teams, they must improve their squads. Al Ittihad and Al Ahli are 2 other teams that have closest level with Al Hilal and Al Nassr. But surprisingly we have Al Taawoun that can finish the season in the 4th place, it is above the position of Al Ittihad.
Here the stats that may explain the level of each team in SPL
Source: statista.comI agree that the the coaches have crucial roles. Even if Al Nassr has many star players, they can't win the trophy of SPL because the quality of Al Nassr coach is still in lower level of Al Hilal coach. Al Hilal has a great coach, he can make the team to play solidly. Having many top players will be useless if they can't play as a solid team.
This was first season while we are having too many foreign players involved and things were looking amazing for them even we are having some big gape of quality but still we are having good performance from the few clubs like Al Ahli and Al Taawon because these clubs ended their season ahead of the champions Al Ittihad and things are looking interesting for the future as well because right now we are having good competitiveness in these teams, and they are going to improve their strength for the future which will create good competition and things will be also at his best for the rest of the season.
They are currently having no quality coaches but as they are working we can expect something improvement in this department as well in future which will surely make good mark into their quality and performance as reports are coming we can expect few quality coaches in coming season which will be interesting.