Maybe, I'm pretty sure I didn't just miss it on my main - it was my 3rd run through, and I was very carefully checking each Ethereal Priest corpse for the enchant. Shouldn't the loot window with this pattern present the BoP warning though? Other items do... Corruptor Scourgestones if you don't have your trinket equipped for example. I guarantee 100% that if Enchant Boots - Fortitude gives a a BoP warning for people who can't loot it, there is no way I just overlooked it on my main.
I suppose it's possible I just overlooked it somehow, though, if it doesn't give the BOP warning. I'll keep a closer look this weekend in SV for the bracer enchant off the Oracles.