The amiibo characters hopefully. And I mean as a feature, similar to how it was in Fates... but with full support features just to give them some personality and make me want to use them.
And that's pretty much it. I'd hope it'd be an amiibo only feature so you can avoid them if you don't want them. I'd like to see Anna go back to Tellius levels of Anna. Give funny tutorials. Otherwise, keep it fresh.