Well... ok.... but who needs a lock-on anyways?
Besides, what if a future non-Nintendo IP Warriors game is released on Switch with all the new features from Hyrule/Fire Emblem Warriors? How could you not be interested by that?
A lock-on takes care of the camera work. It's also optional, so if you don't like it, you don't need to use it.
I am convinced that Koei is so eager to continue a partnership with Nintendo that there will be enough Nintendo IP Warriors games on Switch.