BLU needs to be allowed to queue or be used in the open instance areas like Eureka and Bozja that has no party composition requirements.

Aside from that I feel like the BLU weapon is wasted potential. I feel like there should be more of them and each one with some kind of theme or a specific monster/enemy aesthetic and bonuses to specific spells or spell families since they chose not to put stats on them. This would make it feel more involved to me. One of the main things I liked from FFXI's BLU was that you acquired bonuses by having certain spells slotted together.