Ezekiel was specific according to the book as to when Jerusalem was destroyed. Jehovah was a 'Numberer of Years' I think he layed on his side for 390 days representing years. Which the book makes I think says was exact to 607.
Ezekiel was authenticated by what he said coming true.
The book I believe makes this clear.
On page 216 it says
"Shortly, within our twentieth century, the "battle in the day of Jehovah" will begin against the modern antitype of Jerusalem, Christendom."
If i understand it correctly this did not take place and so they were not authenicated as a modern day Ezekiel and not commissioned in 1919 and so in my mind it calls into question the preaching that they do as I think the two are linked and i think this is different from the first century. The preaching was centered on Christ and his death and resurrection and the apostles status did not hang on whether the end Armageddon came within a certain time frame.
Of course I could be wrong.