I would still register the complaint with DJI. If enough people do this, they may do something about it.
If you decide not to do it, DOWNGRADE the FIRMWARE STRAIGHT AWAY! The problem will only get worse with the existing firmware that is loaded in the aircraft.
Next step is to stop the crack from propagating. Perhaps get a new lower outer shell or use an epoxy to seal the crack?
Yeah Right!!!! good luck with DJi on the phantom. I went through the agony of dealing with DJI with cracks. no crashes. babied my phantom. no high speed use. Use super glue and baking soda. DJI customers service sucks.