There are 2 potential outcomes: either the sky really does fall, and there's a meaningful uptick in bad things happening to iPhone users, in which Apple can easily point the finger at the EC and say "they made us do this". Apple looks like the good guys who put up a good fight for their users, but ultimately their hands were tied, and they'll probably get the revisions to EU law they're so desperately fighting for.
The other possibility is that the sky does not fall, and Apple looks both silly and malicious at the same time for ever having suggested that it would, which was clearly in bad faith.
Clearly, Apple cannot afford scenario #2, so I think they will probably never give their users the actual freedom that the MDA requires them to. They will just exit Europe entirely before allowing that to happen.