When it comes to the Bosnian crisis in 1908, I have seen 2 different perspectives on the annexation:
1) It was a bad move that worsened A-H's relationship with everyone else.
2) It was a necessary move to secure A-H's Adriatic coast and avoid a Greater Serbia.
So with that in mind, what could A-H have done with B-H to have the best possible outcome for the empire? Maintaining the status quo, which let A-H station troops in B-H while making the territory de jure Ottoman, doesn't seem to be a good solution though.