The British's astounding proposal directly shook the Berlin Government.
Annexing the German Federation was what they had long dreamed of, but reality didn't allow it, so to avoid getting hit while they were mixed in, the Berlin Government genuinely suppressed that idea this year.
To their surprise, the British actually brought it up, but this time it wasn't the Prusso Federation annexing the German Federation Empire, rather the German Federation annexing the Prusso Federation.
The order had been reversed, and the nature of the situation had changed. With the Prusso-Russian war ongoing, the Berlin Government lacked the confidence to negotiate terms and had to relinquish its leadership role.
Wilhelm I was troubled, as making concessions was not as simple as it sounded, Europe was a place that observed legal principles.