As to #3: Why were animals created as carnivores before the fall? Why do lions have fangs and claws? To eat plants? Why do raptors have claws and beaks? What did sharks eat with their jagged teeth prior to the fall?
This is a common mistake made by those not well versed in biology. there are literally thousands of varieties of herbivores, with those same sharp "Fangs and claws," that do not use them for meat, but tough skinned fruits, plants, etc. The same claws that are useful for ripping flesh, are equally useful stripping bark from trees and digging burrows (as Grizzlies and Pandas show us). The same teeth useful for ripping flesh, are useful for ripping into tough fruits and vegetables (try eating an apple with your blunt "herbivore teeth" on the sides of your mouth sometime, without first cutting it up. Its impossible. You need sharp, piercing teeth, as our friend the fruit bat demonstrates).
So, frankly, this whole idea is just ridiculous.
For an interesting read..
http://www.icr.org/article/predation-did-not-come-from-evolution/