Fine, you will resolutely lose when Germany realizes that she no longer needs you to get to 18 supply centers. That her three fleets (and the new builds from dismantling Austria) could quite easily defend her supply centers from any attempt you make to return Germany to a tie-win.
Germany is already close to having too many armies on the eastern front. Mark my words, Germany is not intent on a tied victory, she will be fully capable of soloing in a year or so. Once that happens, kiss your chances of victory goodbye.
If I were Vainglory, I'd string you along, get as many of your fleets into the Med as possible, stack my armies and wait for the appropriate moment (say with 3-4 supply centers to go, and move my fleets into the North Sea and my armies into France. Austria by that point will be too weak to stalemate his armies, and you will be blatantly out of position and unable to prevent the solo. This is the most likely scenario of you remaining allied to Germany.
Austria will not give up her home centers easily, and you will find it difficult to break into the balkans through Ion. The only easy gain supply centers are in the east, away from your forces, and in Germany's grasp, as Austria will not defend them as strongly as she will her home centers.
If you remain in that alliance, Germany solos. It is inevitable.
We do not conduct British foreign policy. We are only here until Prime Minister Athalcor returns from his vacations.
For the foreseeable future, however, We do not regard Germany as a threat.
Now, will you die, sir?