Leverkusen have no star players in their squad. But if we compare Leverkusen's overall squad performance then we have to say that this team is very strong. This team is yet to lose any match in the Bundesliga. They also drew the match 2-2 against Bayern Munich. At the same time, they have shown great dominance in every match of the Europa League. Leverkusen are also unbeaten in the Europa League and have managed to win all their matches. Leverkusen conceded only 3 goals in 6 matches in the Europa League and scored 19 goals. So this group cannot be called weak. Leverkusen are likely to win both the Bundesliga and Europa League titles. If Xabi receives big funds in the winter transfer, he will be able to strengthen the team.
I will disagree with that statement that They d not have stars, I think they do have stars but it is not a star studded team like the Bayern Munich team. The likes of Xhaka are stars, Florian Writz is also a star already since his breakthrough last season and that’s why his Markets value is growing higher everyday. Also in the Bundesliga, Jonas Hoffman is a star too. This guy joined with the others have been the back bone of the team. Also at the defense i nearly forgot about Jonathan TAH who is also a rock solid defender for both club and country.
We all can say Leverkusen took us by surprise but I will say they actually looked like a club that will definitely threaten since from last season when Xabi Alonso took over. The club were in relegation battle until his appointment where he took the team to Europa League after falling just a little short off the champions league spot. I had the believe from them that they will go all the way this season and they are proving that already
In my opinion, the players you mentioned are indeed very important players in their respective roles, but what is meant by star player are players who are famous from season to season whose potential is different from the average player. While Bayern Munich has striking star player such as Harry Kane, like other big team has star players whose names are famous in the world of football. It is true that Leverkusen has quality players at the moment, but their names are not very well known and their potential is good only when Xabi Alonso can take over the coaching chair and can build cooperation with the players so that the performance can be like now.
Since the presence of Xabi Alonso, Leverkusen has started to put pressure on Bayern Munich at the start of this season, which continue to be at the top and has not experienced defeats, so currently it is making it difficult for Bayern Munich to occupy first place, but I don't think this is enough to prove that Leverkusen will wins the title because Bayern Munich will continues to trail Leverkusen until they wait for Leverkusen to slip.