They're good at being exactly what they are - the DoH/DoL equivalent to the combat relics. Shiny tools for people who like shiny things but not game changing in any meaningful way.

The big disappointment is we weren't give the ability to customize them, unlike relic weapons, and that meant wasting a lot of time and materia remelding gear before they became more useful than what we already had. Something that's promoted as being BiS should feel like BiS the moment it goes into your hand and these didn't.