It is very clear, I see the direction of the goals planned by Al-Ahli in recruiting Europe's top players. before, they brought in Firmino, then they had the intention of bringing in Sadio Mane. Unfortunately, the player doesn't seem interested. in the end, Al Ahli made his choice on Allan Saint-Maximin. ideally, these three players have their respective positions, the coach seems to have participated in the recruitment of the player. it could be, there is a rotation carried out by the coach of the Al-Ahli team. The point is, both Firmino and Alan Maximin can swap positions with each other.
IMO, if I refer to the coach's track record, he prefers to use the 4-2-3-1 pattern. but with the presence of these three top European players, the coach has many options to use his system. a common formation, with a 4-3-3 pattern.
Well, ideally, as you say. that this team still needs other newcomers, at least they have to recruit 4 more players. for both midfielders and defenders. thus, this team will be more competitive and ready to compete with other strong teams. btw, most of the Al-Ahli squad is dominated by local players. if they want to compete in the race for trophies, the club can't half-heartedly bring in other players. like it or not, they have to target several other players to add to the team.