I think that most people do not have symetrical dedicated listening rooms so balance controls are necessary for many.
I don't think that fewer parts = better preamp. You don't want unnecessary parts in the signal path but I'm sure there are many preamps with balance controls that sound better than many preamps without them.
I don't think that fewer parts = better preamp. You don't want unnecessary parts in the signal path but I'm sure there are many preamps with balance controls that sound better than many preamps without them.