I don't see an issue with much of what you are claiming to be issues, which are views that I have heard repeatedly......but I suppose that is the joy of personal opinion. Travelling outside of Europe is not much different than travelling within it, unless you are going on an unplanned tour of the continent and hopping between countries. I could still get a job in a majority of countries outside the EU as long as I had a benefit to offer to them, and I am not sure I would want to go to those that did not want me. There are plenty of people who have moved to New Zealand, Australia and the USA and quite happily survive there, because they have something to offer to their new host nation. I recently went to the US and it was logistically no worse than travelling to Europe, I had to do some online form filling, but it was hardly an obstacle that ruined the experience.
Low cost phone roaming is also a myth, I used the same arrangements I had here whilst in the US without any additional charges including unlimited data.....
The employee benefits also really frustrate me when put forward as a European policy. Regardless of whether we would have been in the EU as a modern civilised society, changes in culture and moral views have inevitably changed with time, and as a result the accompanying legislation would also have changed and evolved. If the church can slowly progress against its underlying values and historical beliefs, I am sure even our governments would have established a very similar stance regarding paternity leave, working directives etc.
I am a firm believer of a capitalistic society, and the principles on which it is founded, but even I have issues with the direction globalisation is currently taking us, by creating an abundance of "digital" wealth, and money is the primary focus behind a vast majority of our daily decisions....it is quite worrying!!
At what point does money become more of a priority than our morals/beliefs. It is quite fascinating how strong peoples views are on this subject, and I have always been firmly in the "leave" camp, but as I do in everyday life I always try to listen to the views of those encouraging us to remain with the hope I could make a logical decision if someone did convince me...but nothing has even come close yet......
And as for the Brits in Spain and other countries (of which my parents are 2)...they chose to leave this country and as a result their concerns are not my concerns...I am concerned about the country in which I reside..they can worry about where they choose to reside.