I don't think we've nailed the architecture that will allow things like generalized self directed training, yet, which is what would be needed for something like 'make fusion better'
They seem to be able to make intuitive leaps pretty well. They need to make the same leaps over and over, though, because they lack online learning, so the discoveries only persist after the next training cycle. Context only goes so far.
We're pouring billions into solving that, though, so I would be surprised if we don't get there soon.