I have been noticing when I get ARR dungeons in my daily levelling roulette, if playing as dragoon, I am not able to roll Need for the heavy armour that seems to be the intended gear set for the class.

Date & Time: any
Frequency: always
World name: any
Character name: any
Retainer name: n/a
NPC name: n/a
Monster name: n/a
Class/Level: any
Party or solo: party
In-game time: any
Area and coordinates: I have not tested everything but I believe it is "all dungeons below level 50 that were recently changed from dropping aetherial gear to new dungeon-specific gear", such as (but not only) Haukke Manor and Aurum Vale.
Housing: n/a

Steps:

1. Play one of the relevant dungeons as LNC/DRG with a party, so you have to roll for loot.

2. If a gear piece drops that is labelled as equippable by "tanks and LNC/DRG", observe that you are not allowed to roll Need for it.

3. You are, however, able to roll Need for items marked "Disciple of War" and I believe this is also the type of gear you receive as a free piece at the end of the dungeon.

On the one hand this arrangement may be deliberate, as DRG is still receiving gear it can equip and tanks get exclusive priority to the heavy armour sets, but it doesn't seem right that all the new gear sets (as far as I have observed) have been marked as equippable by LNC/DRG but they are not allowed to have it.

(Assuming that this is indeed an error, it may also affect the as-yet-unannounced new melee class for 6.0 if that will share gear with DRG and you have already programmed whatever determines its dungeon gear drops.)