Saver inventory need not be available for applicable schedule or even equipment changes (equally true with regards to IRROPs).

HUCA can be especially helpful when dealing with a misinformed AA agent - just not so much with the spouse as I can attest to when I received a denial for an extra fun jaunt around a couple of continents in F. My subsequent attempts at HUCA with Mrs EnPremiere strangely elicited the same reaction from her.

I suppose it’s because she is not an avid devotee of the ways of FlyerTalk.