Very good discussion,
When I asked my bible study conductor why those Jesus resurrected didn't live forever, he said because the ransom sacrifice hasn't been paid yet. Also he said that Jesus performed his miracles (healing the sick, resurrecting) to give people a glimpse of the kingdom that would come.
Regarding Matt 8:11, I'm sure the jw response would be that since Jesus will be ruling at the time, earth would fall under the juristiction of his Heavenly kingdom,
I never did understand how lions were ORIGINALLY meant to all eat grass. But then there's Isaiah 11:7-9 says literally that THEY WILL. So I dunno,
Every time I think I get it, I have another thought, then suddenly I don't get it,
Crank,