Moon Level is lame, Lunar level should be the name use for the 5-C tier.
So I open this thread to discuss the change of name, thank you for reading.
To be fair, Luna is only the name of Earth's Moon, like how only Earth has the name Terra/Gaia and how other planets were named after human religious mythological supernatural/paranormal/preternatural figures/beings. (In this case, specifically Greco-Roman deities.)
I think it's better to keep the cosmic body tier names as they are to account for cosmic bodies both within and beyond the Solar System instead of changing them to only refer to bodies within the Solar System.
Moon level allows us to give a range of scaling based on various different cosmic bodies considered moons (like the moons of Jupiter, moons of Saturn, moons of Mars, and even moons of exoplanets beyond our Solar System), whereas Lunar level would strictly limit that scaling to only Earth's Moon which would be problematic for tiering, scaling, calculation, etc.
The same idea goes for Small Planet level, Planet level, Large Planet level, Brown Dwarf level, Small Star level, Star level, Large Star level, Solar System level, Multi-Solar System level, Galaxy level, Multi-Galaxy level, and Universe level.
(That being said, maybe Solar System should be changed to Planetary System, unsure if Star System could also be a tier, but again, generally renaming tiers without significant discussion can lead to a lot of issues, including having to edit every page/article of every character with Moon level stats to change it to Lunar level as well as potential confusion about the tiering level names being changed.)
Staff may be able to explain this better than I can in terms of what issues this could lead to.
en.wikipedia.org
en.wikipedia.org