Played through the first hour of the Torna Expansion, (the part they showed at Treehouse, so nothing new yet) and I was really struck by how much better it looks visually than the base game.
For those who missed it, Monolith have said the expansion uses a new engine that they're building for future games; its still a work in progress so Torna doesn't benefit from its full potential, but they said some improvements should be noticeable, and they sure are.
It just look much cleaner and more vibrant.