Exactly my point, bringing in a celebrity player there would give the indigenous players kind of low morale and inferiority complex might set in, thereby promoting the players to start competing for recognition among themselves rather than cooperating and delivering results as a team.
Personally I believe that with more training and motivation, the Leverkusen team would still deliver like last season and by the end of this season, the players would've developed more confidence to incorporate a new player of any worth. Bringing in a player it's good to be done during preseason in such a team of young players to enable them blend in before season sets in properly.
Players that are high profiled players will always enchanced their capacity and having absolutely everything to absorbed pressure. Maybe it's high time Xabi Alonso push for his exits from Bayer Leverkusen? Checking his stats in the managerial role I think he's tried and given his very best to the club, they're currently included in the category of one of the best clubs in Germany. Bayer Leverkusen have to make improvements in their team because watching previous performances and game stats against RB Leipzig, definitely not encouraging on their ends.