I've watched my fair share of anime, including the original Fruits Basket, and if I could rate this season more stars, I would.
The character development is fanominal, giving us a glimps into their pasts, emotions, traumas, and true intentions. This introspection is helpful to realizing that no one is truly a villain, their wrongful actions are just driven through their own pain and their attempt to deal with internal struggles (which I believe is useful to realize even in daily life, outside of the show).
This season comes full circle, tying off any loose ends for each character/sub-plot that was presented throughout the show as a whole. The animation style is quality and beautifully done, and the sound/voice acting truly drives home the emotions that these characters are feeling.
Overall, if you're wondering whether or not to watch this season, I highly reccomend you do! In my opinion, it is the best season of the three. So, happy watching! (ps. be prepared to cry)