One thing that might help here is if we clarify whether these verses were talking about the end of the WORLD or the end of the AGE. In 1 Co. 10:11, which you quote, the word "aion" - age - is used. This is the same word used in Matthew 24 when the disciples asked Jesus about when the temple would be destroyed, and what would be the signs of His coming and of the end of the AGE. In the Jewish mind, there were only two ages: the age of the Law and the Prophets, and the age of Messiah. The age of the Law and the Prophets was to bring in the age of Messiah. The age of Messiah is eternal.
The "end of all things" WAS at hand when Peter and John and Paul were writing their letters. The entire Old Covenant world -- the first heaven and the first earth -- was about to be rolled up like a scroll, to be replaced by a New Creation -- a new heaven and a new earth, presided over by Jesus, the second Adam.
I know this is strange to you, but I believe it's worth discussing. Don't write me off as a heritic.