Here's one example of the countless environment interactions that've been added to the demo. You can click on almost everything, or tap it, or press Enter or the A button next to it, and the protagonist/s will react to it. World-building! Texture! Banter! All that good stuff.
And here's a fight clip, showcasing the addition of status icons and more rapid command entry. By default in RPG Maker MV, you have to confirm your input for everything except "Guard", but as you can see above, I've made it so that Song gets into "Counter" mode as soon as you select "Counter", etc.; no need to confirm. This, with much shorter in-battle animations than previous, really speeds up the battles, as far as JRPG-style battles go.