Their reasoning on range is stupid. Melee players that get the brunt of 90% of the CC in any game, will never see a difference because they'll still be at range of the bard anyway (that will be a lot more vulnerable from it though). Ranged players that used to be affected by nocturne from time to time, one of the only CCs you ever get to deal with unless you go melee, are finally free from being silence ever again. This kind of nerf is completely counterproductive and the best way to miss the mark period.
It's a job that needs a very specific mindset to play. You need to abuse and literally spamm your dashes all around, not only to get your procs, but for survivability. Only counting on Fan Dance and Honing Dance for damage mitigation is foolish. As DNC you should almost always be using procs and Sabre Dance more than the regular attacks. You need to work on your dashes so you don't suicide into the enemy, but otherwise they actually make you so annoying to catch and kill that it makes it the most slippery job by far (more than Nin, or even Mnk/Blm). Obviously you're still weaker than a melee so it's more punishing. If anything DNC is still stringent on the range you keep with enemies because it's still a ranged job. You don't want to go to melee range unless you have a safe window for Honing (Honing is a noob death trap if you're too trigger happy with it). You'll always ideally be dashing around just behind your own melees, not with them.
The high AoE the job is capable of outputting is just tied to almost every skill it has being a good AoE move, among them Sabre Dance and Starfall which are great at bursting people yes, but also used exactly like BLM under LB, meaning on the main blob of enemies.
I agree with the statement, although I'd say I still use fire on BLM during LB, half fire then superflare on an enemy blob before finishing with half stacks on ice while they're burning. If we're losing or there is not an enemy concentration making it worth it though, yeah I'll go full ice for sure. I do believe the fire dot is only worthwhile if spread over many players, because it really, really burns their resources down just recuperating and healing, and that passive is pretty powerful on its own.