Tbh when people who have voted Leave, which incl my PIL, say they didn't want to send EU citizens away. It reminds me of people who voted Conservative at the last GE but didn't think that the PM would slash benefits or thought it wouldnt apply to them.
The whole campaign was about immigration. I am sure that some people voted Leave but don't want to send EU citizens away but thinking it wouldnt happen was as naive as the people voting conservative who they relied on benefits.
The general political discourse is STILL completely focused on immigration.
So yes I personally believe that they WILL send people away if they don't meet whatever criteria. And the Permanent Residence Card is one way to do so.
If this was not their intend, they would have no reason to tell people who failed to pass said criteria, which is about one THIRD of people btw, that's potentially about ONE MILLION people, that they need to get ready to leave the country. They could just have said, Sorry, you don't fulfill the criteria and you can't get the card.
Fwiw, Britain is one of the very few countries who will treat spouse in that way. Most other countries will let the spouse stay because this would otherwise mean splitting families and putting CHILDREN in a very precarious situation. Or of course, it can also mean you are just sending your own citizen into exile to another country to have dare getting married to someone who isn't from your own country.
On a brit POV, it is worth remembering that the people affected by this ruling aren't just the EU citizens. It's also the very British spouse and the children.
But hey ho....