How does one scale down the power creep in support abilities? The incidental self-heals that tanks picked up in Endwalker? The sheer glut of heals the healers have by Lv.100? Etc. Etc.

If you just take that all as-is into lower-level content, spicy pulls won't be as spicy any more, for example, which strikes me as a step in the wrong direction.

But really, this talk of scaling potencies and whatnot misses something: If it feels bad to have a "gimped" rotation when synced down, surely it also feels bad if you're actually in the middle of leveling? I'd rather see effort put into designing jobs so that the distribution of abilities and traits across the level range actually has some logic to it. At each of the major breakpoints (Lv.30, 50, 60, 70, 80, 90, 100), it should be clear what new "feature" gets added to the job. PCT gets this right, for example.