What criteria for deadminning are you thinking of?
"Unpopular for
deleting 1000 fair-abuse images" or something that'll be usable for
that shouldn't be amongst them, for instance.
The same at the criteria for a block. Violating policy. When such a
violation requires action and what action is required should be at the
discretion of the crat, just as it's at the discretion of the admin
for blocks.