I would expect that a significant part of their traffic is IFR on a flight plan which circumvents the requirement for PPR anyway; so I don't think that workload is much of a reason for implementing the requirement for PPR it in the way that they have.
I would agree 100%.
What I am try, and failing, to get across is the mistaken belief that they're introducing PPR for the usual workload reasons. They're not. They're introducing PPR as one of several methods to discourage SEPs at the airport.