Hi d-iivil, first of all congratulations for your newborn. Let me explain my reason for overwrite: suppose I want to create a new theme, based on Theme A, I make changes and save as MyTheme. Later if I change my mind and make it different, let's say based on Theme B, I change to Theme B first, make mods and now it's time to save as MyTheme, which is impossible as Theme Customizer say it exist. If you change the "save as new" to just "save as" and ask "overwrite y/n?" if already exist, I think will be nice. Not a big issue but just my 2 c.