cdma only is gone or is just located elsewhere
The option is gone when you choose networks. In order to get it to change you need to input *#*#4636#*#* in the dialer and go into Phone Info and change it to CDMA Auto (PRL). I did notice though that if you shut down the phone after doing this, it reverts back to LTE/CDMA. I had to change it a few times as well as shut off the phone before it finally made it stick. Very odd