Hello! Thank you for your suggestion!
What you mentioned could be useful, but I have a feeling that plugin might cause me a lot of trouble haha.
For what you're suggesting, I think one option could be to use any of these existing plugins:
https://notritter.itch.io/ritter-map-transform-plugin-rpg-maker-mz
https://www.tyruswoo.com/rpg-maker/mz/tile-control-mz/tile-control-plugin-v1-0-f
The idea is good, but I'd like to create things that don't already exist 😅