Turning the tables was a necessary move for Franz. Despite Austria's significant influence within the German Federation Empire, the Central Government led by Hanover was still more pro-British.
From the standpoint of the German Federal Government, developing closer ties with the British and leveraging their strength to ensure their own independent status clearly aligned more with the interests of the ruling class.
In comparison, the Vienna Government's daily calls for the unification of the Germany Region made them difficult to get close to.
This concern was limited to the larger Sub-States; for the vast majority of smaller states, these worries were non-existent. Aligning with Austria posed no threat, as they were all just followers anyway.
Influenced by nationalism, most of the small states in the Germany Region leaned towards rejoining the Shinra Empire, fulfilling their dream of becoming a major nation.