I'm sure there was a offical post saying casting and recast to scale with the level of the scholar.

Although Raksha's linked post could totaly be used as an example too even though its indirectly saying it.

"I would like the effects of “Light Arts/Dark Arts” to increase proportionately to your level.
We plan on making this adjustment. We would like players that play scholar as their main job to receive more benefits than those utilizing it as a support job."

It says the effects of light/dark arts, the reply was "we plan on making this adjustment."

This was long before the mention even of the development of regen and helix adjustment idea by the development team or implementation to test server. Which then would be discussing to the FFXI community about the current light/dark arts effects, which is casting and recast.

There was no mention about the augmentation of light/dark arts with new effects which is what we got.