Well, night. I made a thread in the Smash 4 forums if anyone wants to check it out:
https://smashboards.com/threads/which-returning-stages-in-the-3ds-version-would-you-replace-with-new-ones.503442/
https://smashboards.com/threads/which-returning-stages-in-the-3ds-version-would-you-replace-with-new-ones.503442/