I love that representation was added into the game. It added flavour and vibrancy where it lacked. We have a ton of skintones, better textured hairs, sliders for makeup, and CAS/Build/Buy items as well. It added some value to the base game where some, including me, felt it lacked.
But the CAS/Build/Buy is great and for that very reason it proves we spend way too much time in it and not enough in-game playing our sims. We don't need more contours, jewellery or accessories. I see way too many simmers speak on how they enter CAS, make a pretty sim and exit game, or that CAS is all that they play (and that's okay too; no judgement!).
Our CAS/Build/Buy has numerous options, an abundance of things to choose from. I wish game play could be on that level as well. There's nothing for us once we select done. Enriched, diverse game play is needed.
The developers time and resources NEED to be poured into a greater game play experience. The Sims 4 feels like the neglected child. :(