First of all, no, publishers don’t necessarily own the copyright. Most authors do a licensing deal with a publisher, but they retain the copyright to their work. My understanding is that music industry contracts vary a lot more, since music is usually more collaborative, but lots of artists still own the rights to their songs. But even if that were true, artists being forced to sell their rights to cooperations isn’t an issue with copyright, it’s an issue with capitalism. It’s like blaming America’s shitty healthcare on doctors instead of a for-profit system controlled by the insurance and pharmaceutical industries.
Well, I think we’ll just have to agree to disagree. To me, most of the updates have been set dressing, not significant changes to the formula or gameplay. But I guess that’s a matter of opinion, not fact.