It seems that CGEL is saying that almost raw in [i-ii] and fiendishly hungry in [iii] are all predicative adjuncts, not predicative complements.
In [i] and [iii], I agree that almost raw and fiendishly hungry are adjuncts. But is almost raw an adjunct in [ii] too?
If it is, how about this?
He served her steak almost raw.
Here, is almost raw an adjunct too?