Please decorrelate party support from party damage

[Semirhage]

Do you have a source for what Yoshi said about that specifically? It's possible I read it already in a liveletter, but I forgot tbh. I just know that one of the Stormblood launch (or just prior) liveletters, which was LL 36 or 37, had a Q&A when they specifically said they were done balancing jobs around difficulty.

So yeah they tend to send very mixed signals there.

Lodestone post about nerfing P8S
If you scroll down to the section titled "Why Adjust The Duty, Rather Than Job Balance?", you'll find this:

When balancing jobs, each job's base damage numbers at the applicable item level are adjusted with respect to the difficulty of playing that particular job and its rotation, as well as its support actions and their effects.

So last tier, he said explicitly that they balance around "difficulty" and utility.
*laughs in RDM*
*laughs in the entire melee role*