I love the classic anime, and I like the artwork from the manga, then the classic. The new artwork is nice, but it's not very consistent, nor is it proportioned correctly. Hell, this picture here looks way better than the artwork they're doing but.... at east we have Sailor Moon. And that's something we cannot complain about!
In the original artwork (manga) she is portrayed very skinny, like how most asians are-not being racist but most artists shape their characters in the way they see beauty. Skinny is gorgeous to them, obviously the girl eats. She just might have an abnormally fast metabolism like some people do.
~It can be natural to be that skinny because I'm sadly a prime example~
The artwork in the manga does differ from Crystal's artwork, so its an extension of the original artwork. The classic anime artwork is therefore older, but the Crystal anime art is still... newish? There are some differences, but I think that Crystal's art is based on the manga version, making it pretty new.
I'm replying to an old comment you made. You said about how the Crystal art is older than the classic series, yes? Well, the Crystal artwork would be newer, not older, because its still only based off the original artwork. In order of how old they are, it would be: manga, classic anime, Crystal anime.