Let's not bring the skill floor back up after they finally lowered the massive skill cliff of the class.
The problem isn't that BLM is too easy now. BLM was always a stupendously easy class in principle. Its difficulty almost always came from contact with boss mechanics. Nonstandard wasn't a real thing for most of the classes life, so the majority of its difficulty was learning where to stand during fights and maximizing cast times.
The problem with this reworked BLM is that the devs well and truly, finally, have killed caster DPS' core gameplay. Sitting still and casting. If the class still had 2.8s and even 3s casts, 7.2 would be a challenge harder than the hardest ultimate. That's how much movement there is in modern fight design. That's how utterly divorced it is with older fight design and how roles fit into the game. Unfortunately, this issue is so dire that RDM won't survive modern fight design without a major change, and I strongly suspect that BLM and PCT will both lose their ley lines because this nonsense is extremely caustic to core caster gameplay. And then we'll have the true reality of casters laid bare. Casters aren't that hard to play bereft of cast bars. Even shadowbringers summoner isn't that hard if you remove the cast bars, outside of optimizing the pet AI to not drop abilities. It's also core to casters as an identity, so every class that gets them reduced or removed has slowly gotten worse and worse.
The devs need to bring back full cast bars, and design fights with 2 of 5 roles not having much in terms of movement. They need to be static classes. That is the challenge, that is where the fun of playing casters truly lies.
BLM also couldn't skip jack crap in Stormblood either. Your highest damage spell was foul, followed by a proc'd thunder 3, then fire 4. The entire class was maximizing fire 4, and the only time any BLM skipped anything in the rotation was because the boss was about to jump and the timers wouldn't survive said jump. All the nonstandard stuff where BLM started skipping casts came about because of high spellspeed builds in shadowbringers, and didn't gain traction until paradox solidified it in endwalker. It's part of why I say nonstandard is demonstrably not intended nor is it healthy for the class. It's the equivalent of summoners in Heavensward boosting their expected damage by 25-40% by abusing the bad design of Dreadwyrm Trance, snapshotting, and contagion. Doesn't matter how much anyone likes it, it is aggressively bad to the game's overall health and in no way representative of how the class is intended to be played, or even how it was played throughout the years.
Endwalker is almost literally the only expansion where BLM was regularly played in a way other than what was intended.