It seems that Barcelona is always lucky to bring in great players even though they are already +30 but their abilities are still very much needed. Last season Barcelona got a player like Lewandowski and some younger players and now, Barcelona got Gundogan at least in an easy way too. With a transfer like this, I personally believe that next season Barcelona can still dominate La Liga. But interestingly, whether the presence of Gundogan can make Barcelona's performance better in the Champions League, of course it will be an interesting thing to look forward to.
No one can guarantee whether the presence of Gundogan in the Barcelona squad will make them better or not. However, if you look at what Gundogan has done at his previous club, it is clear that there is great hope to be able to make Barcelona even more solid. He is an experienced player and also has good skills on the pitch. One more thing, at his previous club he succeeded with the strategy implemented by Pep Guardiola, and we know Xavi also has a strategy that is almost similar to what Pep Guardiola did, so I think strategically I'm sure he will quickly adapt to Barcelona.