There was a noticeable change in her voice in the last transmission, sounded a bit shaky.
This voice analysis stuff as example above is getting a bit tiresome. How many NTSB CVR summaries do you see these kinds of descriptors?
What you feel is subjective and of no use to the investigation unless it is qualified by expertise. All the more reason why the CVRs are generally not released to the public.
My suggestion is stick to the words or lack of and not the voice behind the words