Here's a thought. Limit our dual wield traits and put them at a point where subbing /RDM isn't going to really give people a benefit, making it a "native job" sorta thing.

Call it Florentine and limit it to equipping daggers and some (but not all) 1H blunt weapons in the offhand slot. Make a version that's 0% delay reduction at 35th, 5% at 55th, 10% at 75th, 20% at 95th.

Yep, that means it's weaker than THF DW- but c'mon, we're talking a job that has B-grade sword and dagger skills here and all kinds of native ways to improve their melee ability.