Having tried fighting the first boss on Hard, I'd say it's a good challenge - Assuming this is the same difficulty that it will be in the final release.
I like that you can damage her shield during her defensive phases, but this has some implications. Using 1H, often attempting an attack results in you stepping forward and hitting a fan, due to the small hit range. Using 2H, the slow attack speed makes it hard to get a hit off quickly without getting nabbed in the process.
But using ranged magic allows you to stand in the most defensive spots, where appropriate, and pummel the crap outta the shield, and using Plant Summon wisely can do a metric shit tonne of damage. However, you're then left with a deficit of MP for when you can damage her properly, so I guess it balances out for all three. But then it seems like a false positive, because I reckon the risk slightly outweighs the reward. Maybe I'll git gud and see the light.
I have a few complaints as well.
The amount of damage you can do with 1H in each situation varies a
lot. For defensive phases, the spinning wheel which changes directions pretty much always gets me at least once, and I have no time to do any damage to the shield. The attack where she moves amongst various stationary fans is easy to get a load of hits in above half health, but almost impossible to do damage and not take any when below half health. The attack where the rings move inwards is hard enough when above half health, and becomes even more difficult when below half health.
For offensive phases, I'm practically running for the whole of the phase with two attacks and the phase with fans coming from one side. I can get a load of damage off with the pendulum (but not the dual) and the fan lines with gaps. It would be nice if these were evened out in a way.
My biggest complaint is - why can't we perfect guards the fans?! If you can deflect a punch from a mech 100 times your size, the flying swords of Teddy / Freddie and a headbutt from a fucking hydra, what makes these fans indestructible?!
This fight would be much easier for a professional guarder like myself if we could. Even if the fans don't disappear, being able to time a perfect guard well would let me get a load more damage off in the offensive phases. It could work just like the Hydras - does standard damage to a shield if perfect guard, but breaks the shield otherwise.