Originally Posted by
Thievery
It's kind of hard to explain, because when Bunn first brought Warren back, he was changed permanently into his Archangel form, with complete control over himself. After Bunn left the character, Warren has since spent the last five years repeating the same story of regaining the ability to control his Archangel form, only to have have his inability to control his Archangel and form and Death personality returned in his next appearance with no explanation as to what's changed.
I hope that made sense, because I feel that I have not articulated things properly.
Warren hasn't had the healing blood for a good long time. Probably hasn't used it since Austen left the X-Men.