It's not going away, it's just turning into a 30-day lock for new registrations and transfers-in. Where it disappears altogether is where there has been no change other than to the registrant info like address or phone number.
And this 60-day lock has always been about limiting credit card fraud and ensuring stolen domain owners have enough time to seek court protection or UDRP proceedings before these domains can resold. Credit card fraud is going to be rampant under a 30-day lock, as chargebacks have a 45-day limit.
For example, scammers currently use stolen CCs to buy expired domains at places like GD, Snap and Dynadot, to try to sell them though a "push". But then GD claws them back at 45-days, leaving the new buyer with nothing. So many careful buyers only accept a transfer code, thus leaving GD et al holding the bag in this case, and it will interesting to see how these major players respond to this change that will cost them millions.
I just don't see how a new 30-day lock is going to limit credit card fraud when chargebacks take 45-days. 3rd-world domain thieves are probably having a big parade right now.