Not till Alpha. This is all prealpha stuff.

Everything has been redone basically. Some stayed but they redid the enter engine to the Soulbound engine and redid the whole backend and well what you see now.

More of a difference in the front-end client. The difference is that SbS is deliberately using simpler assets in the Pre-Alpha client so that changes to mechanics don't need to wait as much for asset changes. Once the mechanics are fleshed out and considered stable, the full client will get updated (which if I understand correctly is mostly a matter of updating the assets as both clients are using UE4).

The transition from Pre-Alpha to Alpha is likely when that will start being visible in what we see from the studio.

2016 videos were basically promo videos, the bulk of them were probably pushed out explicitly for the kickstarter.