Since the regrade changes and removal of obsidian there is no purpose to the non-superior regrade charms (except Boss gear for the 1% of the population).
To make things worse they are cash shop / rng crate prizes.

May I please suggest that either
a) the loot boxes are revisited to exclude them
b) they can be upgraded to superiors (via a recipe or mirage isle trader)
c) they work on Celestial items

Thanks and regards