I was just wondering if you were thinking about adding this in.
To be in line with vanilla floors this would require:

1. Keeping all metal floors locked until smithing is researched.
2. Re-adding the vanilla floors "metal tile""gold tile" and "silver tile"
3. Adding a the stats (that include beauty and cleanliness) from vanilla to the above mentioned
tiles. Stats are here:

https://rimworldwiki.com/wiki/Floors

Putting this as a discussion to see if others are interested in having this added.

Appreciate all your awesome mods.