POD is late 1915, The Germans win a string of victories in the early, summer and fall, and occupy much of Northern and Eastern France.
Oh the victories wouldn't all happen in 1914, but if a determined assault on Verdun (it would now be surrounded on three sides) happened in 1915 and resulted in the fort's capture...
OK, the mutiny will end the war, but the Entente would be losing badly anyway.
You have the Germans doing better in 1915 in the West, looks like on the offensive. This can only happen if A-H holds against Russia. A-H holding against Russia in 1914/15 at Lemberg or 1915 in Pmezsyl will mean a CP win, Mutiny or no Mutiny. If the east holds, a series of bad events happen for the Entente compared to OTL.
1) Italy likely does not enter war.
2) Russian much higher casualties for Russia.
3) The two lost fortress cities contain a big portion of the active duty A-H officer/NCO corp. A-H has a few hundred thousand more troops, and all units do better because of better NCO's.
4) Bulgaria likely enters war earlier. If this option happens, then the Ottomans get supplies sooner and siege artillery, and Gallipoli is worse for UK.
5) Galicia was a big portion of the food supply for Austria proper. Less food issues.
6) Russia evacuated many men of military age from Galicia, these men can now be drafted by A-H.
Now yes, you POD can easily lead to a mutiny/rebellion in 1916, and the war will end with a huge CP win.