This is an absolutely terrible move by EA to block this after initially allowing it.
I honestly believe Sony needs to remove the ability for publishers/developers to disable shareplay. This feature will be useless if major publishers just disable it.
Also, did EA push out a patch for this, or were they able to do this via PSN?
Publishers being able to opt out is why Share Play is even a thing. Sony wouldn't get away with attempting to mandate the feature; there'd be a lot of resistance. You can bet Sony wanted it to be a universal feature but had to settle for allowing for an out.