I think you are expert in putting the cart before the horse with regard to this case. I see no logic in adding another case to the list of five already in the pipeline. I do see the logic in the police continuing their investigation into MM's case using the opportunity given to them by this procedural holdup.The difference being he was charged in the latter 5 cases, but not in the MM case. So of course in a case where you are actually charged, your defence team start in on procedural arguments.
The point about the five cases on hold is that quite obviously all the legal formalities allowing CB to be charged had been gone through and had been accepted as valid because they were proceeding to trial. All five that we know of.
All that his lawyers had to work with was the jurisdiction procedure. As a delaying tactic it was classic, but that is all one can say about it. It doesn't make any of the accepted charge sheets go away.