An economic union should be about tariffs and the free movement of goods, not an entirely unelected bureaucratic federal government.The vote that occurred today was by the EU parliament, which is entirely elected. The directive was prepared inside the JURI committee, which also exists entirely out of elected representatives.
Also, you can't have a single digital market without a single copyright regime. The economic union implies the single market which implies a single copyright directive. I agree that the contents of that directive is lamentable, but the need for one is clear, even for those opposing this particular directive, provided you buy into the notion that single markets should exist at all.