Why would we even want that, the whole point is to break the monoculture and single vendor dependency not to create an new mostly irrelevant one to be stuffed with has-been and rejects from the national levels the way most of EU's big prestige projects end up being run.

One of the thing that sets EU apart from most federations is that it kind of enables a lot more regional independence in how things are actually implemented while still guaranteeing the rights of the individual citizens, this lead to a lot of dynamism at the local level despite the failings of the central level, and allow this kind of projects to succeed and create paths for others to follow at their own pace.