Pace
In some ways the official spin is easy - we expect to have legislative control over our own people - in other words if you live here, then, rightly, you should be subject to our laws, not those of a country the other side of the globe.
That is not unreasonable.
However given the current status quo it is unreasonable that those already operating in the existing legislative climate do not have a realstic mechanism for converting their existing licences.
(I appreciate that if they did it still would sound the death knell for new pilots obtaining a private EASA IR unless the requirements are relaxed, but that is yet another matter)