When people were hit by the Shaod, their seons changed. They went to sleep, kind of. They became mostly unresponsive.
When Knights broke their oaths, their spren changed. Pattern I think? said it took longer to summon dead spren because you had to revive them each time.
Deadeyes spren don't do much. They're mostly unresponsive.
Are they in the same kind of stasis?