Good news!
Everyone who has had the FIOS TV app problem this week, check again today.
I woke up this morning and -- MAGIC! -- both my ipad and iphone apps work as they are supposed to, recognizing that I am indeed on my home network and therefore providing all content.
It was apparently a glitch on Verizon's end. They just didn't want to admit it and have chat/phone customer service folks just tell us it was a known error they were working on. That would have been so much more considerate. I would have wasted so much less time on this had I known there was never any fix from my end.
If you read the reviews of the apps from the last few days, most were complaining about this problem with 1 star reviews. Maybe that's what finally got this handled. Thanks, everyone!