[Sleepy Speculator]

From what Dietrich said and implied, the use of Awakened flesh created a monster, not a sane minded claymore type hybrid. They weren't programmed to eat flesh, they were merely conditioned to hunt exclusively for a certain type of flesh. This of course implies that the hunger was already there, so just as yoma and AB's wanna eat guts, so the AE's also 'hunger'. The hidden yoki and lack of yoki sensing apparently is due to some form of tampering probably surgical, which explains the lobotomy and sewn eyes on all the AE's.