I prefer XI's BLM that could call down incredible spike damage but burned themselves out fast and had to rest/regen MP.
In XIV BLM can sustain high damage for entire fights without even really having to rest. This wouldn't be a huge ordeal if fights like Chimera didn't offer BLM's safe spots to simply stand in and spam thunder combinations while ignoring just about every mechanic of the fight.

I don't really think BLM needs a nerf as much as I would perhaps like to see it receive an adjustment and adjustments aren't necessarily nerfs.
That said, there's not a whole lot of things to do in the game right now to really see where all these classes are at so over all i'm withholding judgement and content to simply say the Chimera fight is lame.