Coaches say lots of things after the fact...No, Jose spoke about wanting to build up with a three block at the back and Davies tucking in to be the third CB, whilst Aurier became a wingback. It was definitely a preconceived idea of his.

I'm not disputing that it happened, just that it was more of a natural byproduct of having Aurier/Davies as your fullbacks.
If it was a deliberate tactic that he wanted to implement then you'd have it happening both sides intermittently, we didn't, it was just Ben Davies being told to stay back because he was slower and less of an attacking threat.
It's splitting hairs anyway.