Hmm, yeah I'm at a loss as to why SMN's bind duration got nerfed; it's not nearly as crippling as Sleep. At least when you're bound you can still potentially function, pending your job, or continue to heal and Esuna/Leeches/ED if you're a healer. Sleep offers no such luxuries. I don't see the correlation between a nerf to a bind spell whilst sleep spells are untouched, aside from the fact that the devs were so focused on toning down SMNs they didn't stop to think there's something worse in regards to crowd control.