Yes, only one point, so it will not be difficult for Bayer to reduce this gap, there are already 7 points between them and Bayern, which will be much more difficult to reduce and so far I think that Bayern will not allow this to happen, because the level of opponents in the Bundesliga allows them to feel comfortable. But Bayer at the beginning of the season lost a lot of points with teams like Werder, Holstein, Bochum, if you want to defend the champion's title, you need to beat such teams.
I agree on that if you want to defend the title or get it again you must have beat nearly every team specially the smaller ones.
But exactly the smaller teams are the one where a lot of top clubs are having there problems and this you have in every league.
A lot of teams have got there struggle against Werder Bremen and also Bochum.
On the other side there still so many games to play in the german league and a lot can be happen there.