Better.
You can pick up objects on the stage and throw them at your opponent.
I don't follow the game closely but from what I've read it's an easier MK.
Special systems? Well, there's elements in stages that can be interacted with by characters. There's a clash/wager system that's kind of like a more involved burst. Aside from that Idunno.
Interactive stages sounds both interesting and terrible. I guess I'll watch some gameplay and keep an eye out for that stuff.