My experience yesterday is that the online booking will work well for 90% of the members who are computer literate and are willing to "trust" the computer confirmation of their reservation.
Members who either do not use computers or do not trust the online booking confirmation will continue to call Member Services. In another 20 years the situation may become like the bank teller situation in many banks where they want to charge you extra for speaking with a live person.
Members who are computer literate, but who have complex situations (e.g. I want to book 2 studios, 1 one bedroom, and a grand villa all at the same time, or who want to try to change resorts at the end of the home resort booking window) will continue to call Member Services.
So - for me - this is a great improvement in availability. I can book online in the evening when Member Services is closed.