How does that multilateral free trade treaty works? You'd still need the same bureaucracy compiling the norms, except instead of doing it once for 27 countries

How does that multilateral free trade treaty works? You'd still need the same bureaucracy compiling the norms, except instead of doing it once for 27 countries you'd do it 27 times. See how long it took to create other agreements like the EU/Japan, EU/Canada and failed EU/US.