If you want to just let the individual nation states carry on being dysfunctional, I guess there's nothing to see here. If you want some sense of joint outcome that doesn't wind up in a Rafael shouting match on the other hand, you would like them to at least coordinate better and the best auspices for that outside of existing pan European JV and NATO (which invites a 600lb gorilla into the room, well into greenland) would be some kind of EU led process. Sure, in law it's individual states, thats not going to change.
What has to change is posture and supply chains. The former demands a willingness to actually act. The latter demands spinning up. Spinning up takes time.
I wish I had shares in rheinmetall. Well, really no I don't but I think their prospects are good.