I am eager to read about how your new product will handle slurs. Your previous product with that other company almost always positioned the end of a slur at the tip of a stem or flag, whereas I usually preferred to put the end of a slur at the note head -- particularly in the dense choral scores with which I usually work. There was no way to change this behavior by default. When I use this product, I have to spend an inordinate amount of time manually re-positioning the end of most slurs, which takes multiple keystrokes per instance, and I never found a way to automate the process. I hope you take this situation into account with your new product, and provide a user-definable behavior for selecting where to put the end of a slur.