It's normal for the time being. The incentive for tanks/healers to queue for low-level roulette isn't really there.

People are leveling up NIN, doing the 2.4 storyline, farming atmas and horses from primals due to the increased drop rate, focusing on capping Poetic every week, Hildebrand, and a myriad of different things. Settle in, because it'll be this way for a while. I suggest you focus on fates and leves instead.

It was always a very poor choice to implement a DPS alone - especially one as anticipated as NIN. The reason they released it alone is because Yoshi wanted it in the game from launch, and while that's fine, they really should have just waited for 3.0. It's causing a lot of headaches for people.