If they weren’t accepted universally, they aren’t canon. Isn’t that what being “catholic” is supposed to be about?
You might want to consider the first 1500 years. Did the Holy Spirit abandon the Christian people for 1500 years, just to pop in again in the 16th century and reveal: "You got the canon wrong"?
And as for those who had split from "Catholic," who exactly gave them the authority to subtract books from the Canon? Some king?
And if that's something the British throne and her licensed liturgists in the Anglican Church had the competence to do, do they still have it? Could Queen Elizabeth II and Abp Justin Welby split off a couple more books if they felt divinely called to do so?
Or, instead of 1500 years, switch your focus to 2,000 years. The big majority of Christians still have the full canon --- 73 books. There has been a Christian church in continuous existence for 1900 years in Mosul, Iraq. They speak Aramaic, the language of Jesus. They have the same canon as the rest of us Catholics. I think it's a good bet that they're clinging to their whole Bible as they high-tail it outta there --- as we speak. If the ISIS couldn't make them give it up, I very much doubt the Anglicans would be very persuasive.