The thing that bothers me the most about their examples as to why BLU won't fit in the game, namely the death spell, is that it didn't always work in the singleplayer games either. A lot of monsters were immune to death magic, bosses specifically, and it wouldn't be the first time monsters in FFXIV have shrugged off status effects. Hell, the further into this game you get, the less monsters are affected by status spells at all. Making a lot of the spells useless past a certain point and just taking up room.

Frankly I think BLU could have worked in this game and that eventually they might find that sweet spot for it. However I'll wait to pass my final judgment.