It would be a lot more democratic if people didn't use their European election votes as protest votes. The European parliament is no more a failed democracy than our own.
I fail to see the argument for us needing to be a sovereign state actually I fail to see the point of countries altogether. As far as I'm concerned no other human is my lesser or better anyway based on where they are born, all humans should be entitled to the same levels of education & healthcare in our lives. Yes I understand that's extreme idealist view of the world and I don't expect any of the potential issues of that view to be resolved for extremely long time.
But I fail to see what makes us so great over any other country or peoples and why being a separate country is important in the slightest.
Would never happen though.
And I doubt a superstate would bring that vision closer.
Hell look at the mess America is ATM, and that dosnt have the issue of language, historic and cultural differences that Europe has.