Of course I was not trying to present what the Bible "teaches". That doesn't interest me anymore. My intent was to show what we as JW's believed and were taught. Personally, as a JW I was never certain of the New World being vegan. I usually showed my Bible Studies texts describing paradise menus including "dishes filled with marrow" or "joints and their marrow". Marrow seemed close enough to meat to somewhat open the door of meat-eating as a possibility.
Most of my adult years were spent in Arkansas and Texas, where meat eating and hunting are considered important even by JW's. It was difficult enough to ask potential disciples to give up Christmas, birthdays, etc. "No meat" might have been a deal breaker.
When the Watchtower came up with the "adjusted understanding" of Isaiah 11, applying it to the personality changes of individuals, they faced a real dilemna. To have reversed the "lion will eat straw like the bull" literal understanding would have nullified all the paradise art work. The cutesy stories about a little girl and the lion would have been mute. They came up with a compromise: primary application=figurative, secondary application=literal.
As to the "great evening meal of God" literalness, that concept has become more ludicrous as the world's population has grown. There's even some JW specualtion out there about Jehovah zapping most of the carcasses magically, leaving merely a ceremonial cleanup for the birds.
How difficult it would be to present all these Watchtower concepts with a straight face. It's embarrassing now to admit that I believed all this stuff for over fifty years.
tms
