I so rarely find myself in auditions.
I would limit any sort of suggestions regarding casting, other then - I know her, I have worked with him, etc, etc, but only if asked.
I would dred the dead I stated "Hire this actor", and then that actor turned out to be bad, not do the work, quit, be fired, etc, etc.
Although, on the flip side, if I was outside the audition - at the end of the day - I might mention "So and So was extremely rude", etc.