The sad truth is we said exactly the same thing during Trump's first mandate. Granted it was not as bad as this time, but on a general principle: "we know someone like Trump can happen once, so we need to assume it will happen again!". And… as soon as Biden started talking, the EU went back under a cozy mama-wing, easy solution.
This time might be different… or not. Far right parties are getting stronger in France, Germany, already in power in Italy. They all somewhat allied with Trump and his goons. All the effort made to render the EU sovereign could be discarded just as quickly as they were put in place. Imagine Trump's successort is someone smart enough to understand (or rather not too stupid to not understand…) the benefit of US military supremacy and protection, and you may see some EU govs happily reduce their military spending again: the US promised to have their back!
At this stage, I am less pessimistic than I am careful: the direction is somewhat correct. We (the people) need to make sure it stays that way.
But for Snowden's case: I wouldn't come back either. The minute he sets land in Europe, he becomes a bargaining chip in sode negotiations with the US! He could try his chances in Spain, until the next election, then it's uncertainty all over again.
Apparently in this case he's a Saudi agent. So it seems he's primarily a whoever-pays-him-the-most agent. And he's a very very worthy investment: for 110M$ of fees, Saudi got a war worth tens of billions of $ paid by USA's tax payers.
Well, there a side-effect they probably didn't anticipate, but you know Saudi rulers: they funded Bin Ladin, ISIS, their former king was convinced Earth was flat, their scholars still don't believe it rotates, they thought vanishing a journalist in their embassy would not be noticed. You can't expect a real strategy or deep thoughts…