I doubt that small power outage would affect the shape of the skull and beak at that late in the game, probably happened early.I didn't notice any other signs that the chick hatched too early. It's yolk was fully absorbed and its shell was pretty clean. But it was the first chick to hatch so it may be the cause. We also had a power outage rather late in the hatch- around day 19, that lasted about 4 hours. That may also be the culprit.
Could be it'll do just fine, could show some neurological issues down the road.
One thing I've read about cross beaked birds is that you need to keep the feed deep in the dish because they can't single granules up with the tip of the beak, they need to kind of scoop it up.
Good Luck!