Scholar has the worst design of any job in the game, and here's why.

[Anahlise_Auhn_Giinslai]

Each expansion I've expected Ruin II to get upgraded into a SCH-specific spell like Broil since Stormblood now. Do I dare hope anything will change about it this time? Ruin II should have the same potency as any given expansion's Broil, but should cost more MP. That's how it used to work for a hot minute, and it was perfect. Why did we not maintain that when the answer was right there in front of us?

I have.. experienced this. $_$ at Lv54 Scholar, and did not do the Lv54 subclass quest, my Ruin I and Ruin II have the same 140 potency. X'D
there is some sort of glitch or some thing. the Lv54 trait upgrades Ruin II potency and upgrades Ruin I to Broil I, but.. at Lv54 without doing the Lv54 quest, the lv54 trait increases Ruin II potency, but does not upgrade Ruin I into Broil I, as Broil I is locked behind the Lv54 quest...
so I.. half learned the trait?, but the trait is shown greyed out and not learned/not active, yet still upgraded Ruin II potency...