what is a morph?
a morph is basically damaged genes that natural selection can't quite cull... a hiccup in the DNA. so how does nature attempt to get rid of them? by attaching potentially lethal or damaging genes to them. the only reason most of the morphs we see today can survive is because they're in captivity.
we just happen to see the novelty in breeding animals to display these hidden traits... thus you see some problems. there are a ton of Ball morphs out there that have their own issues (as well as other snakes), but the breeders DO NOT TELL YOU because it'd simply hurt their sales and the view of morphs in general.
i love coastal jags, always will... most of the people that talk crap about them have never even held one, seen one in person, etc - let alone keep them and breed them.