I recently experienced a crooked beak for the first time. It did not have a happy end. The bird hatched fine but hte beak got more and more twisted over time. Reached the point where the side of the face looked mal-formed, like the whole skull had some developmental issue. I kept hoping it would self correct. No such luck. It worsened.
At first the bird could eat. But as time went on the beak twisted so much that the tongue was always visible, the interior of the mouth got dried out, food stuck to the birds face in dry, crusty clumps. IT had trouble drinking and eating was more difficult than a bird whose beak has that fine, pincher/stabber ability.
The thing looked and acted miserable and despite giving it many weeks to show improvement, it never happened. Culled the bird. It was very light (mind you it was young) but it should have weighed a bit more.
I think if the beak is not too bad and if it does not get worse, just stays the same, the bird might make it. BUt if it is a worsening situation...that bird will be hungry and miserable all the time.