To start I'd like to say I'm disappointed in the BLU concept that we are getting but, I'm upset with the reasons they gave for going this route.

The reason of "Oh, you don't have this <BLU spell>. -kicked from party-" isn't really a reason, to me at least. This is because there is nothing stopping me from not doing my class/job quests to unlock abilities from said quests, as well as, nothing stopping me from queuing for a duty without my soulstone equipped. The count of abilities from quests, for a 1-70 job/class, off the top of my head I think is around 13 too. Both of those can result in a similar situation in DF.

The second reason of "spells like Level 5 Death would be to strong and we can't just make everything immune to it" is also non sense to me. There's 2 things that can be done. First, that's why there is a thing could balancing, you know the thing they are already doing with all of the other jobs. Second, which is the much easier option to go with, simply don't give it to BLU. If not having stupid OP spells is the price I pay to have a fully playable job its fine. I don't think anyone that really wanted BLU was ever expecting to get spells like Level 5 Death anyways.

If they just came out and said they wanted to try making a new system for jobs rather then saying oh its a new job, when in reality its like half a job, I wouldn't be upset, just disappointed.