I noticed the same thing, I was calling into make a few changes and said "cancel" because it seems the retention CSRs really know what they are talking about. The 1st call (to add Showtime) went OK to start, but the CSR Forgot to authorize my recievers. So I called back got a 2nd CSR explained what happened and she authorized them. Then I asked about RZC as I have had it free for the last 2 years on my account. She informed me I must be mistaken because DirecTV has never offered it as a stand alone product. Shen went on and on how I have them confused with comcast etc. After told me I was wrong and never had RZC I just said "I am not going to argue what service I know I have had, I'll deal with it a later time..." and left it at that. I was rather frustrated by the whole situation.
I began to think the same thing as the OP, DirecTV no longer routes you to a rentention CSR when you say "cancel," I didn't even have the option to say "cancel" twice.