Not a big problem. After all, even a little improvement (eliminating AIDS) would be a huge improvement. (sorry… ) Of course there is a final answer, too: “if the greatest good for everyone is to enjoy the beatific vision, then the solution is simple - bypass this vale of tears, and create everyone directly into heaven”.
After all, what is the point of this existence? It has no value at all, it is just a “testing ground” to find out who will get to heaven and who will be thrown to hell. But this is also rendered meaningless, since God already knows the “score”, even before we are created. The Calvinists are not idiots either.
Now, if someone still would prefer to keep this world, there is a second-best option for this existence. Organize the world based upon the Gaia principle. Everyone is part of the super-organism, everyone participates in its “workings”, not just the living beings, but everyone would add a little to its tapestry. No competition, only cooperation. After all our “stomach” will never entice a revolution against our “lungs”, so this principle is well-established on the small scale. So the model is successful, let’s get to the “production” phase.