I think it would be easier for them to change the preaching from a "message of hope" to a "message of judgement" than it would to rework the GT prophecy. Of course, they have reworked their teachings so many times over the years that they can literally change anything they want and be fine.
But, if the goal is to reduce the printing operation and reduce staff and locations, they can simply change the preaching work to just be public preaching (carts/trolley) and the internet along with studies and RVs on people that expressed interest. Keep the WT as study only and eliminate the Awake. Change the midweek meeting to local groups doing the book study again with a once month "service" meeting. Or eliminate the midweek all together and just have a weekly broadcast.
The preaching work as it is currently handled is their biggest infrastructure issue. Drastically changing it would allow them to cut way back on physical assets. Certainly they are trying to reduce the number of KHs used. And if you went to one meeting a week, you could really utilize those buildings even more. Or in areas with AHs, you could have congregations with hundreds of people.
I still think they have lots of options but they need to be more strategic than they have been in the past. They simply make too many bad business decisions.