A few of these are actually pretty common Christian points.
part of the bargain
God doesn't have to bargain with physical laws. He can do literally anything. He could make a universe where everything explodes randomly for no reason but wills earth to not explode because he loves us. That would be fantastic evidence for his existence and basically disprove a natural universe.
omnipotence and omnibenevolence don't necessarily preclude suffering
I agree, that's why I specified unnecessary suffering.
Would you really want to live in a world where you didn't even feel sad when a loved one dies?
There's allegedly no suffering at all in heaven, and that's the end goal for Christianity. So if you're looking down and see your descendants getting melted by a volcano you wouldn't be sad. Doesn't seem great.
There was also allegedly little or no suffering on earth in the garden if you take Genesis literally.
So all of this is fully within God's abilities.