I do believe in this instance, that the goose is cooked- because of the not sharing terrorism intelligence- and because it is an essential part of Schengen and EU. The UK had a massive exception before as it refused to be part of Schengen.
Agreed though, that it is not good for the soul- for some of us, the consequences will be massive- those of us who come and go between EU and UK not for holidays, but for our families. Perso, as you well know MawB2, both OH and I have two passports- so this small part will not affect us at airports- massive queues and trouble at the Tunnel will, in a big way.
The point here however- is that those going berserk about this- are the Brexiters, who voted for this- which is so ironical.