So first-up, this is a completely new version of the DU, not a revision. Unfortunately, the Service Centre guys do not know what has changed or what it may facilitate, other than, I presume some design issues with the previous being removed. Externally it looks identical, but major changes internally, they said.
In driving it felt lovely and smooth, but as the old one was on the way out, that probably doesn't mean much. I'm still on 6.2 as well, so no change in throttle mapping and all that stuff.
So what's the part number of this V2 DU? Do all AP enabled Model S ship with this new DU? There has to be someone with AP who has needed a DU swap.