Malcolm,
While I agree that some separation in the stators may improve the design, I have to say I’ve not seen or heard of both stators failing. The failures I know of, or have read about on this forum, have all been the B stator, and in no case has this precipitated a failure of stator A. I assume that stator A failures are seldom because the output of that stator is optimized for the engine loads, which are very predictable. However, the problems that owners have experienced with stator B are undeniable.