I created Accessible News Slider. If you read through the descriptions of the different accessibility groups, I make mention that keyboard users (typically using a mouthstick) are the toughest to handle. This is why the “View All” mechanism was added. There is no way to key/tab through the slider news items accept for when they are all viewing on the page. This very much meets the spirit of the WCAG, since an alternative to viewing the content has been provided for these users.