Dogma, you need to give up this fight as you cannot win it. PUI/POP as wonderful as they have been for the game of Pokeomon, they also have a long history of not explaining the decisions that they make. There has never been any reason yet given as to why Battle Roads and City Championships can only have a top 4 cut no matter how big the participation, or why States are limited to top 8 cuts. In the past I have attended City and State Championships that had top 16 cuts, the top cut restrictions were put into place with no reason given for why it was occurring. When a decision is made you just have to accept it as there is no other alternative open to you. If you desire you can keep asking for explanations but you will end up only getting frustrated in the end.
Which is why I keep asking for a contact in PUI, I know I'm derailing this thread, which is why I keep apologising!