I'm assuming nobody has bought it then?
The most major change IMO between NL1 and NL2 is the actual track creation. Instead of using nodes that tween between each other, it now uses a totally different system by tweening in the middle of nodes, rather than between them
surprisingly this makes hand building rides INCREDIBLY easy as there are virtually NO pumps in the tracks.
Another interesting thing is that track style, type and rotation and handled using nodes rather than segments ( this makes life a hell of a lot easier).
it allows you to put catwalks and such on normal track, and the roll nodes even have a "no lateral G" option, allowing your coasters to be as smooth as you wish.
Loving it so far, it's certainly different to NL1.
You also have to "Freeze" tracks in order for supports, tunnels, and other stuff to be drawn. You can still test the coaster in wireframe mode however
It's well worth the £30 guys