So your argument is that this change in the economy (albeit insignificant in your eyes) is insufficient to have a separate realm, the same would be true for having FFA loot and ploot in the same realm, especially since the total drops remain the same.
There is no autoloot share. Do you mean ploot or timed loot? If so, you can switch freely what you choose between every game you create and/or enter.
Yes since iit requires the players to do a work around while it could be easily streamlined by Blizzard. That is why it should be introduced as an official option by Blizzard.