I think the other thing you may want to consider is merging cutter and lasso into one tool. They’re both pretty similar. The default could be cutting and holding cntrl or alt to duplicate instead would probably work just as well. Up to you, I don’t mind the current system but at the same time if you put in more tools than you may want to consider it. Right now animation paper doesn’t have a lot of tools but maybe once you introduce a paint system you’ll see it get a bit more cluttered.