Maxperson
Morkus from Orkus
And yes, you're quite right that the rules never specify that a character dusted by disintegrate is dead, but then, they don't say that even if you're not wildshaped, so far as I can tell, even though it is strongly implied.
A disintegrated creature and everything it is wearing
and carrying, except magic items, are reduced to a pile
of fine gray dust. The creature can be restored to life
only by means of a true resurrection or a wish spell.
The bolded seems to say that being reduced to ash kills you.
