Now that we know RDM has no changes...

[Sylvain]

It should honestly apply on Fleche. It can be essentially be applied and kept up 100% of the time where you either delay your melee combo or delay the piercing debuff otherwise.

Also, we should just remove all permanent vulnerabilities on DPS and put them on tanks.

Altough I personally think weapon debuff should just get removed because they have too much of an impact on specifci job DPS which impact negatively raid balance and make some job synergise too well with other (DRG + BRD/MCH as we are all too well aware)

I agree with your suggestion and it'd be very nice if another job get that debuff, this would allow a different comp. I don't think RDM would replace DRG in the meta but it would be a viable replacement (I believe).

Regarding the weakness, having a different effect on dps and tank could be a solution but I think they should instead avoid putting weakness on boss spamming very hard hitting AoE that nearly kill all dps after Shield + AoE dmg reduction. I prefer to see weakness as some sort of soft enrage that simply makes the fight harder and harder.
Unfortunately FF14 doesn't rely much on soft enrage, all we have are hard enrage and skippable phases.