I wouldn't remove buffs, but I'd try to intentionally desync buffs, or create odd pairs like 90s party buffs, 2m party buffs, 3m party buffs. People will always try to optimize, but fight design was a hell of a lot better in stormblood than it is now, and part of it was not having these godawful DPS checks in a burst meta where most of the party's damage happens during a 20s window every 2 minutes.

Hell, as much as I hated PLD's old design, I know some people liked it, clunky bloated jank and all. Aligning it to the 1/2m meta was positive for the class in general, but in specific is bad. Its rotation feels a lot less full of life than it was before despite the issues it had.

Likewise, classes like BLM or SAM, true over-time damage classes, waned heavily compared to classes that can burst. I want bursty classes like NIN, but I also want sustained damage classes.

The biggest change I want to see though, truly, is the removal of multiplicative buff stacking if nothing else, as well as, if it can be managed, the removal of snapshotting. This entire debacle is almost entirely caused by the insanity that is multiplicative buff stacking combined with snapshotting. It's what broke Summoner in HW, it's part of what made Bard/MCH/DRG/Nin? broken in SB, it's completely shattering the enjoyment of the game now when you have DPS variance high enough to fail a DPS check because you didn't stack buffs correctly.

Easier content with looser DPS checks, but with classes with more personality to them was vastly more fun than what we have now. I miss stormblood, even if I didn't like some classes like DRK because they were too busy in an annoying way.