Chibi looks great, though I agree that I wish she looked just a little bit older. She grew up a considerable amount over the course of the manga but hasn't really changed in the anime since S3 (and that's just because she had a weird gangly toddler-like appearance in S2, lol.)
I'm surprised by how much disappointed I am by this - I guess since in the 90s anime, Chibi-Usa doesn't mature up much, I was hoping to actually get something for once from this reboot (especially since in the manga, she appears older and canonically she's supposed to be over 900 years, her physical growth would show her acquired maturity as both a person and a Senshi).
Did she really have to be stuck as a 'Chibi' till the very end? (Cause that's it guys, there's no more - not until another reboot in 10 years).
Could they be unbothered to ask Tadano an additional settei for her or were they out of budget?
I'm still hoping there's a special sequence somewhere in there where she's drawn correctly but oh well...
They really couldn't have drawn her like during the Double Moon Heartache? Really?

She looked so badass with Moon!
She's supposed to be at the very least the same height as her Quartet!
https://flic.kr/p/2ozgzTq
https://flic.kr/p/2ozknAD
https://flic.kr/p/2ozjwPN
https://flic.kr/p/2ozknDV