I don't believe the EU as an institution is capable of stepping up to the plate, it's too bureaucratic, too slow, impossible to move forward when all it takes is one bad faith actor or a few freeloading cowards. When huge decisions agreed upon by the majority can be blocked by the minority, it will never be a suitable military replacement to NATO. It will never as able to counter America/Russia/China.
We need something new, a new organisation, a coalition of the willing without the bad faith actors and cowards. This is why an "EU Army" will be a failure, a thing like that needs to be agile and united, EU is "united" in the sense that the majority agree, but it's irrelevant when the rules of EU mean a minority can block something.







