Of course Leverkusen will consider new strategies that they can use to achieve victory in the new season's matches which will soon come. So far, the gaps in the strategy they used last season may already be known because every coach will evaluate the strategy used by the enemy and look for weaknesses. Every strength you have will definitely have a hidden weakness. Xabi Alonso is aware that the strength of a big team like Bayern Munich has weakened after many of its great players left and were injured, so Leverkusen can take advantage of this opportunity to improve its performance.
Apart from analyzing the weaknesses of their rivals, each team is also very obliged to improve its own strengths in order to face the new season by implementing new strategies as you said. Because if in every season nothing changes about a team, be it the strategy or the players, this will certainly be easier for each rival to read so that the rivals will find it easier to attack them in any match. So I also think that Leverkusen still needs to add new strategies to their squad for next season for a winning streak like they got this season.