Stagger was never fun it just makes fights one sided. Cause if it worked like that, you'd just need 1 tank (commando) and 7 Thm/Cjn (Ravangers) to stagger the mob quickly, and it will just be tooled on.
It's funny you say that, because its the only thing that would keep magic damage relevant in this (or any FF) in late game.

But its cool to hate on XIII so obvious enhancements to the current systems from that game are ridiculed.

Jobs that can stagger won't be the DPS jobs, but DPS jobs can dish out more damage if they get help from stagger jobs. Ravagers didn't do much in the damage department, you still need DPS Jobs. They can't heal either, so you need healer Jobs. They also can't tank, so you need tanking jobs. They can't buff, so you need buffing jobs.

What they could do is CC/enfeeble, so they have two uses: enfeebling and mild DPS/staggering.

Because to be quite honest with you, what this game doesn't need is 4 jobs sharing the same basic utility, DPS. And to be even more honest with you, magic DPS is useless in every FF aside from XIII in late game. Every other build was more effective, even if you could clear the encounters with inferior setup.