The case of Leverkusen is a typical case of the fact that buying or adding players to the squad isn't really the problem rather fixing the team with what they currently have, either by building the team or even improving the players performance, you may want to add a player or two but not everytime a teams isn't performing so we'll that it means that the team needs to change coach or buy new players.

Sometimes the team just needs a good build up strategy and tactical approach which will allow players play optimally I'm their various positions well enough and before you know it these players are already at the top of the table doing just the best, the place of getting good players Ina team to boost the squad dept cannot be put out but then at the same time, you can actually build up a team to be very formidable that even without a star player they will be able to achieve much that they would have achieved with t he star player in their midst playing with them.

Sometimes it's not about getting a star player to play with the team but the ability of the coach to turn the whole team into that of star players where almost every player is a star and not only a few players been able to be the star such that the team becomes dependent on them and their absence will then mean losses to such team but the case of Leverkusen shows that every team can still be less dependent on a particular player.