Bitching about the existence of Blank is dumb. WHM has Fluid Aura which does the same thing. It's about knowing when you should and shouldn't use it.
Though I haven't done any EX or Coil yet. For that I imagine it would be a necessity. I'm not saying I don't want to use it but this was the first time I have ever encountered an issue about not using it.
You shouldn't need to ballad basically ever in any existing dungeon unless something has gone hilariously wrong.
By the end of 2.5, Ballad wasn't mandatory in any normal encounter. It's something you popped in case deaths drained healer MP, but no EX Primal or even Coil turn really needed it after overgearing kicked in (doubly so for after Echo.) There are a couple of spots in T13 where ballad was handy since literally nothing else was going on anyway, and mayyyyybe after T12 Bennu phase, but.
You probably haven't encountered an issue because it's never been needed. Foe Req should be played constantly, Ballad and Paeon are basically progression or "somebody has screwed up" tools.