Here's a few things that I think you could add that will improve. Things that I thought of while using novelty.
the first thing that let me down was the inability to do multiple things with buttons. If a button could change a variable, and trigger more than on event it would dramatically improve novelty's power. Not sure how this would be programming wise, or if you thought of it.
also the sliders. They should have a little more precision. Having to type a number by hand after sliding the slider and finding out it would skip the number you wanted produced and 'ugh' moment for me, lol.
Not sure it this is possible, but I think it's an awesome idea. Have you considered making it possible to import actions? That would be amazing. That way advanced users could program, and create their own actions, and give them to the community. That too would make Novelty pro the bomb.
those are the only two things I can think of right off.
the more powerful button would cut down on actions needed to get stuff done, as well as cut back on the need for scripting for newbs like me.
also the precise slider will keep people happier in a simple way
