Smoothing is actually standard in Animation Paper too. 🙂 We have no settings for it – because it just works quite cleverly and subtly. You would definitely notice it if it wasn’t there. At some point we might present a couple of parameters for the user to be able to adjust it.
The issue with the lasso is that the data in one drawing will build up exponentially. So after 15 – 20 copies on top of it self, number of lines have doubled for every copy, and then memory and CPU usage explodes. We put in a warning with some recommendations. It pops up when picking up takes more than 2 seconds. Hopefully you got that too?
It’s a complex problem. Not just a matter of collapsing something. 🙂 Animation Paper wasn’t designed with extensive lassoing in mind. The positive sides of how this works are the ability to draw and lasso beyond the frame borders, unlimited resolution, so when scaling/rotating you get no degradation or blurring of your lines. Also coloring will take great advantage of this line engine of ours. As well as the ability to work in lower resolution for speed and exporting in higher resolution for quality.