I still think the grading system is largely the right thing to do. But the fact that London's fate was sealed before the season started exposes a fatal flaw in the system. If London somehow manage to fight their way to 11th, their reward is being cast adrift. Why even bother?
Is it even 1 up, 1 down? Could TOXIII also replace Cas? Could Bradford replace Leigh?
This could have been so much better if any "B" winning the championship could replace any other "B" that finishes bottom of the pile. There still an incentive to become an "A" and guarantee your place, but without the embarrassment the sport could potentially suffer.