Pretty straightforward POD here. Freddy 3 doesn't acquire cancer, and his OTL reign of 3 months goes on for a longer period of time. In OTL, he died at the age of 56, so presumably he had quite a few years left in him (and if his father's health is any indication, a good two and a half decades!).
Frederick III and his wife Victoria were relatively liberal minds compared to the Prussian and German establishments, and the Emperor himself was Anti-Bismarck and sought to lesson the Chancellor's power.
Frederick III and his wife Victoria were relatively liberal minds compared to the Prussian and German establishments, and the Emperor himself was Anti-Bismarck and sought to lesson the Chancellor's power.