Power Disc Brakes not working on hard stop?

Sorry that makes no sense. MC is 2 separate chambers the only way for front brakes to be impacted by the rear is for the rear to limit pedal travel. In your scenario with rear break wear that would just allow more pedal travel and put the pedal closer to the floor which is not happening. If anything with more travel required by the rear brake it should put more pressure on the front brakes. Sorry but when its not right its just not right