No, Xabi doesn't need to do much, believe me if the defeat in yesterday's match was just a small mistake when Xabi used the wrong goalkeeper. I don't know whether my opinion is right or not but Leverkusen still has a very good appearance from the attack line and even the defense line is still very stable. However, I support your opinion if even though last season was successful using what Xabi used, it would be better to still have other alternative strategies so that they cannot be defeated by opponents in the next match.
In the upcoming match Leverkusen doesn't need to try too hard to get 3 points but remains consistent without being defeated even though it's only 1 point but that's much better than losing points. Against Hoffenheim should be an easy task for Xabi.
Changes are needed to make Leverkusen a strong team like last season and maybe Xabi Alonso should look for alternatives when the game does not match the strategy he expects. The rotation that is done must be really right so that they don't have to lose points or get one point. Next Sunday's match is indeed much easier because they will face Hoffenheim and in terms of quality Leverkusen is above them. But even so, Xabi Alonso must also be careful where in the match must be a revival point to achieve full points as an effort to maintain the opportunity to occupy the top three or five rankings. The defeat when facing Leipzig must be a lesson so that Leverkusen can play much more consistently in the upcoming match.