Re: industry practice?
"while it is a bastard act to change the existing policy to this new one"
Hasn't it always been the case that .eu domains have to have a connection to the EU? It's not a general open tld like .com.
If that's the case, the policy isn't so much changing as being enforced against those who will soon cease to be EU citizens in an EU country.
In other words, just like Galileo, there are things that EU member states get to do, and there are things that non members can't do. Britain is changing position (not the EU), and the rights are changing to reflect this new situation.