Perhaps this is merely a case of "from where you stand",
but imo, Razed Ruin did exactly that. When we're at the point that
I don't mind a THF meleeing an NM,
I think we're about as balanced in the DD phase as we can get.
There's always gonna be one or two jobs that stand out at the top, and jobs some people consider "trash", balance is when you've got more jobs than not that can be considered "relevant".
Maybe it's just me, but pre-Abyssea, people seemed more close minded that only a few jobs were considered "serious DDs", whereas post-Abyssea (and more specifically post-RR) people consider a fair number more jobs to be "serious DDs" if not necessarily "Overpowered DDs".