They are stuck with 1914 for a while yet, as they have to keep the idea of an imminent Armageddon in the minds of J.W's, or many more would leave.
They have debated at the top level many times over the decades how to extricate themselves from the 1914 nonsense, and came up with nothing that would work to keep the Org. going for perpetuity. Hence the stop-gap Overlapping Generation nonsense.
The REAL problem they have is simply expressed as :
No 1914 = No choosing by Jesus in 1919 = The Governing Body are self-appointed Charlatans.
I have no doubt they will extricate themselves from this impasse, but mainly by burying the teachings in a miasma of "New Light", until 1914 is as forgotten and irrelevant as Russell's Pyramidology.