Brave and Faith weren't really offensive stats. They were... weird... and don't really have a good direct translation into FFXIV.
Brave only governed a few attacks (knight swords, katanas, and unarmed as well as the damaging dances) and principally governed the use of reaction abilities (Brade Grasp with 100 Brave basically rendered your immune to all physical attacks; it was fixed in the PSP version to be only melee, but that was still borkedly awesome) of which there isn't really an equivalent.
Faith was just as much about magic resistance as it was about magic potency; the higher your Faith the more effective your magic was but the more effective magic used upon you was. It was basically a variable magical version of B4B.
If they brought in Orator, I would honestly expect them to not mimic the existing abilities, just as the BRD doesn't mimic any previous BRD abilities (since a lot of them don't really translate well without making BRD into a straight up healer), so that they can provide a more appropriate suite of abilities. A slew of damage manipulation effects would most definitely make them more popular than BRD for any kind of support role since the BRD songs are largely conditional (Paeon and Ballad do nothing if you don't need TP/MP, and Foe's only benefits elemental damage, which only has a significant presence for BLMs, and only by 10%) whereas the ability to increase or decrease either magic or physical damage will *always* be useful.
I would expect them to have abilities similar in function to the BRD abilities without matching them explicitly, such as making them single target instant effects (re: targeted allies immediately regains 20% of max mp) with 1 min CDs, or making them incredibly strong but requiring them to be channeled (so that you can't move or attack while they're active; would probably have to restrict them to something like 10 secs and put a 30s or so CD on them).
Something like this:
1. Pep Talk: Increases target's TP by 300, 1.0 sec cast, 60 sec CD; shares the same CD with Lecture
2. Lecture: Restores 20% of target's max MP, 1.0 sec cast, 60 sec CD; shares the same CD with Pep Talk
3. Condemnation: Target takes 400 potency nonelemental damage when the effect wears off; 15 sec duration; instant, can only affect 1 target at a time (consumes TP)
4. Silver Tongue: Instantly ends the CD on Pep Talk and Lecture; 180 sec CD; off-GCD
5. Inspire Heroism: Target deals 20% more damage and takes 20% less damage for 10 seconds; 1.0 sec cast; 180 sec CD