The reaction may be from shareholders in the case of a proposed merger. The reaction may be from the financial press. The reaction may be from the people identified in 15/16.
There may need to be a process of 'selling on' the outcome. Those who need to think short-term (like journalists) may not be persuaded of the long-term benefits. Those who want to use an outcome for political purposes may be less interested in the mutual benefits of an agreed outcome.

Acceptability always has to be a design consideration. It is no use choosing the material and colour you like but finding that the clothes do not fit.

The acceptability problem may affect one side more than the other. Both sides, however, need to keep it in mind if they want a satisfactory outcome. It is no use saying, 'Acceptability is your problem:

The important design point is whether the concept of acceptability is a consideration from the beginning of the design process or is brought in at the end as a sort of cosmetic.