Well, I was really tempted to keep using my old save file and enjoy V8 from where I've left off, but after reading a few things, I took the awesome decision to start over, and man it was worth it. The remapping of the Terajuma section was really great. The new maps not only look prettier, but the idea of exploring them feels a lot more inviting too.
The slight story reworks made that part of the game seem a lot more cohesive, while adding a better sense of immersion and connection to certain characters (to me Tesla is the greatest example of that).
I still didn't finish all of the new content, but from what I've seen of it so far, V8 really shows Jan's development as a storyteller and even though it's still more than too soon, I'm already looking forward to see what he'll deliver with the future updates.