The Germans might be able to conclude a peace with the Russians sometime in 1917, with territory changing hands in Poland and Lithuania - nowhere near as harsh as Brest-Litvosk but it would close off the Eastern front - there was also constant feelers put out for peace throughout the war.
https://encyclopedia.1914-1918-online.net/article/peace_initiatives
Do you think that, if concluded early in 1917, it could be a war-changer? And what effect do you think such a peace would have on Russia itself?