The LivingWhites adapter doesn’t really have many surprises. The only two notable things are that the entire high voltage side is from ST parts (VIPER16 , 2 x 14NM65N , ST1S10 ) and the other surprise is the other LED not in the manual.
The CC2530 has the 2.4 GHz transmitter and reciever and a microcontroller for the wireless protocol. The Cypress chip handles the buttons and probably the LED’s and speaker (the big square on the right). The UX logic can be in any two of the chips.
The PCB has some capsense buttons that are not on the faceplate. I assume the same PCB is used for both the LivingWhites and LivingColors remotes.