One thing you'll find out is that the EU member states (along with Canada, Australia, New Zealand, etc.) are really not very friendly or welcoming in terms of "path to citizenship".
One thing I'd like to see actually is open immigration and potentially more free trade between the US, Canada, Australia, New Zealand, and the UK. I'd add Ireland but I think EU status would be a problem.
About 30% of New Zealand and Australia’s populations are immigrants. I don’t think we could let many more in! As a comparison, the US is about 15% population of immigrants - and look at the stink over there about there being too many! The places with more immigrants than NZ/Oz by percentage are mostly either small island populations, or Arab states (where you are not actually an immigrant, since you don’t have citizenship rights, and slave labour conditions are rife).
One resulting issue is that some major parts of the NZ/Oz housing markets are already some of the most unaffordable in the world (think San Franscisco, but earning less so even less affordable)! The five most expensive cities in the world by unaffordability are Hong Kong, Vancouver, Sydney, Auckland, Toronto : e.g. Sydney: average monthly income of $6,100 with median house price of $1.4 million. Auckland median house price is $1.1 million, whereas the average individual monthly income is $4,269. We have the land, we just need to build a lot of houses to keep up.
[0]: https://www12.statcan.gc.ca/census-recensement/2021/as-sa/98...
Downright hostile attitude towards "path to the citizenship" if you ask me.