I've seen a lot of people suggest making flash do damage, but I don't feel like that's actually the best way to handle PLD's lack of AOE. The easiest, most basic fix they could do to jump PLD's aoe would be making Overpower Cross-class. The idea behind traited flash was to add to PLD's suite of defensive abilities; blind means potentially less auto attacks. If you pull only three mobs at a time, one flash and circle of scorn is enough to maintain threat so long as the party is focused on a single target or you rotate the RoH combo. Sparingly using flash allows more blind uptime; way more than DRK.

It would also give blood bath an actual use. If you open this up to DRK then AOE pulls get absolutely insane. After all that abbysal drain with constant MP ticking back, you pop the dodge combo while dropping multiple Scourge, then use OP for the duration of Blood bath, and back into abbysal drain with DA if anything is left alive.